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Candidate organic electrolytes for electric double-layer capacitor application

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电池 2004年第5期34卷 337-339页

作者： b.fang y.wei K.suzuki m.kumagai Institute of Research & Innovation 1201 Takada Kashiwa Chiba 277-0861 JapanInstitute of Research & Innovation 1201 Takada Kashiwa Chiba 277-0861 JapanInstitute of Research & Innovation 1201 Takada Kashiwa Chiba 277-0861 JapanInstitute of Research & Innovation 1201 Takada Kashiwa Chiba 277-0861 Japan

Electrolytic conductivity, viscosity and electrochemical behavior were investigated for organic electrolytes based on PC（Propylene carbonate）, mAN（methoxy acetonitrile） and GbL（γ-butyrolactone） solvents. It was found that 1 mol/L Et4NbF4-mAN had the highest conductivity, lowest viscosity and acceptable potential window. the specific capacitance and energy density obtained from the capacitor using 1 mol/L Et4NbF4-mAN as electrolyte were the highest among all the tested electrolytes.（1 mol/L） Et4NbF4-GbL also seemed promising to be used in electric double-layer capacitor （EDLCs）.

关键词： EDLC CbC EIs 电容器

superatom-assembled boranes,carboranes,and low-dimensional boron nanomaterials based on aromatic icosahedral b_(12)and C_(2)b_(10)

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Nano Research 2024年第7期17卷 6734-6740页

作者： Qiao-Qiao yan yan-fang wei Qiang Chen yue-Wen mu si-Dian Li Institute of molecular science Shanxi UniversityTaiyuan 030006China

Using the experimentally known aromatic icosahedral superatoms I_(h)b_(12)H_(12)2−and D_(5d)1,12-C_(2)b_(10)H_(12)as building blocks and based on extensive density functional theory calculations,we predict herein a series of core–shell superpolyhedral boranes and carboranes in a bottom-up approach,including the high-symmetry th b_(12)@b_(152)H_(72)2−(2),C2h C_(2)b_(10)@b_(152)H_(72)(3),D_(3d)b_(12)@b_(144)H_(66)(4),I_(h)b_(12)@C_(24)b_(12)0H_(72)2−(6),and D_(5d)C_(2)b_(10)@C_(24)b_(12)0H_(72)(7).more interestingly,the superatom-assembled linear D2h b_(36)H_(32)^(2−)(8),close-packed planar D_(3d)b_(84)H_(60)^(2−)(10),and nearly close-packed core−shell D_(3d)b_(12)@b144H_(6)6(4)can be extended periodically to form the one-dimensional(1D)α-rhombohedral borane nanowire b_(12)H_(10)(Pmmm)(9),two-dimensional(2D)α-rhombohedral monolayer borophane b_(12)H_(6)(P m1)(11),and the experimentally known three-dimensional(3D)α-rhombohedral boron(R m)(12)which can be viewed as an assembly of the monolayer b_(12)H_(6)(11)staggered in vertical direction,setting up a bottom-up strategy to form low-dimensional boron-based nanomaterials from their borane“seeds”via partial or complete *** bonding analyses indicate that the high stability of these nanostructures originates from the spherical aromaticity of their icosahedral b_(12)or C_(2)b_(10)structural units which possess the universal skeleton electronic configuration of 1s21P61D101F8 following the Wade’s n+1 *** infrared(IR)and Raman spectra of the most-concerned neutral b_(12)@b144H_(6)6(4)and C_(2)b_(10)@C_(24)b_(12)0H_(72)(7)are computationally simulated to facilitate their experimental characterizations.

关键词： superatom-assembling bottom-up approach density functional theory superpolyhedral boranes superpolyhedral carboranes borophanes

Competitive assembling strategy to construct carbon nitride homojunctions for boosting photocatalytic performance

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Journal of materials science & technology 2024年第5期172卷 23-32页

作者： Hua-wei Zhang yuan-yuan Li bo Li Jing-Hui shi tao Huang Gui-fang Huang Anlian Pan Wangyu Hu wei-Qing Huang school of Physics&Electronic Engineering Zhengzhou University of Light IndustryZhengzhou 450002China Key Laboratory for micro/Nano Optoelectronic Devices of ministry of Education&Hunan Provincial Key Laboratory of Low-Dimensional structural Physics and Devices School of Physics and ElectronicsHunan UniversityChangsha 410082China College of materials science and Engineering Hunan UniversityChangsha 410082China

both morphology and composition have a great influence on the properties and functions of materials,however,how to rational modulate both of them to achieve their synergistic effects has been a longstanding ***,we demonstrate a competitive assembling strategy for the construction of metal-free graphite carbon nitride(CN)homojunctions in which morphology and composition can be easily controlled simultaneously by only changing the ratio of assembly raw *** homojunctions are comprised of porous nanotubular s-doped CN(sCN)grafted with CN nanovesicles,which are derived from thermal polycondensation of melamine-thiocyanuric acid(m-t)/melamine-cyanuric acid(m-C)supramolecular hybrid *** unique architecture and component engineering endows the novel sCN-CN homojunction with abundant active sites,enhanced visible trapping ability,and intimate interface *** a result,the synthesized sCN-CN homojunctions demonstrate high photocatalytic activity for hydrogen evolution and pollutant *** developed strategy opens up intriguing opportu-nities for the rational construction of intricate metal-free heterostructures with controllable architecture and interfacial contact for applications in energy-related fields.

关键词： Competitive assembling strategy supramolecular hybrid blocks Homojunctions Graphite carbon nitride Photocatalytic

thermal stability improvement and microstructure optimization of high cobalt content Nd-Fe-b magnets via terbium grain boundary diffusion

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Journal of Rare Earths 2024年第8期42卷 1531-1538,I0004页

作者： Jiyuan Xu Ruiyang meng Jing Liu Jiateng Zhang Rui Han yikun fang shengzhi Dong wei Li Division of Functional materials Research Central Iron and Steel Research InstituteBeijing100081China

the substitution of Fe by Co in the 2:14:1 phase is an effective method to increase the Curie temperature and enhance the thermal stability of the Nd-Fe-b ***,the accumulation of Co ele ment at the grain boundaries(Gbs) changes the Gbs from nonmagnetic to ferromagnetic and causes the thinlayer Gbs to become rare,In this paper,the method of diffusing tb element was chosen to improve the microstructure and temperature stability of high-Co *** original sintered Nd_(28.5)Dy_(3)-CO_(x)e_(bal)m_(0.6)b_(i)(x=0,6 wt%,12 wt%;m = Cu,Al,Zr) magnets with different Co contents were diffused with tb by grain boundary diffusion(GbD).After GbD,high-Co magnets exhibit more continuously distributed thin-layer Gbs,and their thermal stability is significantly *** high-Co magnets(x=6 wt%),the absolute value of the temperature coefficient of coercivity decreases from 0.603%/K to0.508%/K in the temperature range of 293-413 K,that of remanence decreases from 0.099%/K to 0.091%/K,and the coercivity increases from 18.44 to 25.04 *** electron microscopy(tEm)characterization reveals that there are both the 1:2 phase and the amorphous phase in the high-Co magnet before and after GbD,EDs elemental analysis shows that tb element is more likely to preferentially replace the rare earth elements in the 2:14:1 main phase than in the 1:2 phase and the amorphous *** concentration of tb at the edge of the main phase is much higher than that in the 1:2phase and amorphous phase,which is beneficial to the improvement of the *** preferential replacement of tb elements at the edge of the 2:14:1 phase and thin-layer Gbs with a more continuous distribution are synergistically responsible for improving the thermal stability of high-Co *** study indicates that GbD is an effective method to improve the microstructure and thermal stability of high-Co magnets.

关键词： Nd-Fe-b magnets Coercivity Grain boundary diffusion thermal stability micro structure Rare earths

Formation of free-surface vortex and vortex suppression by rotating stopper-rod at end of tundish casting

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Journal of Iron and steel Research International 2024年第5期31卷 1104-1116页

作者： Qing fang Peng Zhao Hua Zhang Wen-hao Zhou Gang yu Jia-hui Wang Hong-wei Ni the state Key Laboratory of Refractories and metallurgy Wuhan University of Science and TechnologyWuhan430081HubeiChina Hunan Valin Xiangtan Iron and steel Co. Ltd.Xiangtan411101HunanChina Hubei Provincial Key Laboratory for New Processes of Ironmaking and steelmaking Wuhan University of Science and TechnologyWuhan430081HubeiChina

A rotating stopper-rod technique was proposed to suppress the formation of free-surface vortex in the *** large eddy simulation model coupled with volume of fluid model was developed to study the steel–slag–gas three-phase flow *** critical slag entrapment height of the free-surface vortex and mass of residual steel were predicted at different rotating speeds(30,60,90 and 120 r/min)of the rotating *** numerical model was verified by water model *** results showed that by rotating the stopper-rod in the opposite direction of the vortex above the submerged entry nozzle,the formation of vortex can be effectively disturbed and the critical height of the free-surface vortex can be *** for the 2nd strand,when the rotating speeds are 30,60,90 and 120 r/min,the critical height of the free-surface vortex above the 2nd strand is 7.3,4.7,6.3 and 7.4 cm,respectively.A reasonable rotating speed should be 60 r/min,which can reduce about 2 tons of residual *** rotating speeds just can reduce about 1.6 tons of residual steel.

关键词： tundish Free-surface vortex stopper-rod Numerical simulation multiphase flow

Overexpression of Kdm6b induces testicular differentiation in a temperature-dependent sex determination system

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Zoological Research 2024年第5期45卷 1108-1115页

作者： Qiran Chen wei sun Lin Jin yingjie Zhou fang Li Chutian Ge College of biological and Environmental sciences Zhejiang Wanli UniversityNingboZhejiang 315100China Institute of Animal sex and Development Zhejiang Wanli UniversityNingboZhejiang 315100China

In reptiles,such as the red-eared slider turtle(trachemys scripta elegans),gonadal sex determination is highly dependent on the environmental temperature during embryonic *** complex process,which leads to differentiation into either testes or ovaries,is governed by the finely tuned expression of upstream genes,notably the testis-promoting gene Dmrt1 and the ovary-promoting gene *** studies have identified epigenetic regulation as a crucial factor in testis development,with the H3K27me3 demethylase KDm6b being essential for Dmrt1 expression in ***,whether KDm6b alone can induce testicular differentiation remains *** this study,we found that overexpression of Kdm6b in *** embryos induced the male development pathway,accompanied by a rapid increase in the gonadal expression of Dmrt1 at 31°C,a temperature typically resulting in female ***,this sex reversal could be entirely rescued by Dmrt1 *** findings demonstrate that Kdm6b is sufficient for commitment to the male pathway,underscoring its role as a critical epigenetic regulator in the sex determination of the red-eared slider turtle.

关键词： temperature-dependent sex determination sex reversal Kdm6b Dmrt1 t.s.elegans

stCF conceptual design report (Volume 1): Physics & detector

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Frontiers of physics 2024年第1期19卷 1-154页

作者： m.Achasov X.C.Ai L.P.An R.Aliberti Q.An X.Z.bai y.bai O.bakina A.barnyakov V.blinov V.bobrovnikov D.bodrov A.bogomyagkov A.bondar I.boyko Z.H.bu F.m.Cai H.Cai J.J.Cao Q.H.Cao X.Cao Z.Cao Q.Chang K.t.Chao D.y.Chen H.Chen H.X.Chen J.F.Chen K.Chen L.L.Chen P.Chen s.L.Chen s.m.Chen s.Chen s.P.Chen W.Chen X.Chen X.F.Chen X.R.Chen y.Chen y.Q.Chen H.y.Cheng J.Cheng s.Cheng t.G.Cheng J.P.Dai L.y.Dai X.C.Dai D.Dedovich A.Denig I.Denisenko J.m.Dias D.Z.Ding L.y.Dong W.H.Dong V.Druzhinin D.s.Du y.J.Du Z.G.Du L.m.Duan D.Epifanov y.L.Fan s.s.fang Z.J.fang G.Fedotovich C.Q.Feng X.Feng y.t.Feng J.L.Fu J.Gao y.N.Gao P.s.Ge C.Q.Geng L.s.Geng A.Gilman L.Gong t.Gong b.Gou W.Gradl J.L.Gu A.Guevara L.C.Gui A.Q.Guo F.K.Guo J.C.Guo J.Guo y.P.Guo Z.H.Guo A.Guskov K.L.Han L.Han m.Han X.Q.Hao J.b.He s.Q.He X.G.He y.L.He Z.b.He Z.X.Heng b.L.Hou t.J.Hou y.R.Hou C.y.Hu H.m.Hu K.Hu R.J.Hu W.H.Hu X.H.Hu y.C.Hu J.Hua G.s.Huang J.s.Huang m.Huang Q.y.Huang W.Q.Huang X.t.Huang X.J.Huang y.b.Huang y.s.Huang N.Hüsken V.Ivanov Q.P.Ji J.J.Jia s.Jia Z.K.Jia H.b.Jiang J.Jiang s.Z.Jiang J.b.Jiao Z.Jiao H.J.Jing X.L.Kang X.s.Kang b.C.Ke m.Kenzie A.Khoukaz I.Koop E.Kravchenko A.Kuzmin y.Lei E.Levichev C.H.Li C.Li D.y.Li F.Li G.Li G.Li H.b.Li H.Li H.N.Li H.J.Li H.L.Li J.m.Li J.Li L.Li L.Li L.y.Li N.Li P.R.Li R.H.Li s.Li t.Li W.J.Li X.Li X.H.Li X.Q.Li X.H.Li y.Li y.y.Li Z.J.Li H.Liang J.H.Liang y.t.Liang G.R.Liao L.Z.Liao y.Liao C.X.Lin D.X.Lin X.s.Lin b.J.Liu C.W.Liu D.Liu F.Liu G.m.Liu H.b.Liu J.Liu J.J.Liu J.b.Liu K.Liu K.y.Liu K.Liu L.Liu Q.Liu s.b.Liu t.Liu X.Liu y.W.Liu y.Liu y.L.Liu Z.Q.Liu Z.y.Liu Z.W.Liu I.Logashenko y.Long C.G.Lu J.X.Lu N.Lu Q.F.Lü y.Lu y.Lu Z.Lu P.Lukin F.J.Luo t.Luo X.F.Luo y.H.Luo H.J.Lyu X.R.Lyu J.P.ma P.ma y.ma y.m.ma F.maas s.malde D.matvienko Z.X.meng R.mitchell A.Nefediev y.Nefedov s.L.Olsen Q.Ouyang P.Pakhlov G.Pakhlova X.Pan y.Pan E.Passemar y.P.Pei H.P.Peng L.Peng X.y.Peng X.J.Peng K.Peters s.Pivovarov E.Pyata b.b.Qi y.Q.Qi W.b.Qian y.Qian C.F.Qiao J.J.Qin J.J.Qin L.Q.Qin X.s.Qin t.L.Qiu J.Rademacker C.F.Redmer H.y.sang Anhui University Hefei 230039China beihang University Beijing 100191China budker Institute of Nuclear Physics Novosibirsk 630090Russia CAs Key Laboratory of theoretical Physics Institute of Theoretical PhysicsChinese Academy of SciencesBeijing 100190China Cavendish Laboratory University of CambridgeJJ Thomson AveCambridge CB30HEUnited Kingdom Central China Normal University Wuhan 430079China Central south University Changsha 410083China China University of Geosciences Wuhan 430074China China University of mining and technology Xuzhou 221116China École Polytechnique Fédérale de Lausanne(EPFL) LausanneSwitzerland Fudan University Shanghai 200433China Goethe University Frankfurt D-60325 Frankfurt am MainGermany Guangxi Normal University Guilin 541004China Guangxi Uninversity Nanning 530004China Hangzhou Institute for Advanced study UCASHangzhou 310024China Hebei Normal University Shijiazhuang 050024China Hebei University Baoding 071002China Hefei University of technology Hefei 230601China Helmholtz Institute mainz Staudinger Weg 18D-55099 MainzGermany Henan Normal University Xinxiang 453007China Henan University Kaifeng 475004China High Energy Physics Center Chung-Ang UniversitySeoul 06974Korea Higher school of Economy 11 Pokrovsky bulvar Moscow 109028Russia Huangshan University Huangshan 245000China Hubei University of Automotive technology Shiyan 442002China Hunan Normal University Changsha 410081China Hunan University of science and technology Xiangtan 411201China Hunan University Changsha 410082China Indiana University BloomingtonIndiana 47405USA Inner mongolia University Hohhot 010021China Institute of Advanced science Facilities Shenzhen 518107China Institute of High Energy Physics Chinese Academy of SciencesBeijing 100049China Institute of modern Physics Chinese Academy of SciencesLanzhou 730000China Institute of Physics Academia SinicaTaipeiTaiwan 11529China Institute of theoretical Physics Chinese Academy of SciencesBeijing 100190China Jilin University Changch

the superτ-charm facility(stCF)is an electron–positron collider proposed by the Chinese particle physics *** is designed to operate in a center-of-mass energy range from 2 to 7 GeV with a peak luminosity of 0.5×10^(35) cm^(–2)·s^(–1) or *** stCF will produce a data sample about a factor of 100 larger than that of the presentτ-charm factory—the bEPCII,providing a unique platform for exploring the asymmetry of matter-antimatter(charge-parity violation),in-depth studies of the internal structure of hadrons and the nature of non-perturbative strong interactions,as well as searching for exotic hadrons and physics beyond the standard *** stCF project in China is under development with an extensive R&D *** document presents the physics opportunities at the stCF,describes conceptual designs of the stCF detector system,and discusses future plans for detector R&D and physics case studies.

关键词： electron–positron collider tau-charm region high luminosity stCF detector conceptual design

Convenient room-temperature synthesis of sulfur and nitrogen co-doped NiCo-LDH coupled with CNts on NiCo foam as battery-type electrode for high performance hybrid supercapacitor

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Rare metals 2024年第9期43卷 4286-4301页

作者： Li song Xiao-Hong Zhong fang-Lin Wang Zhi-Hui Huang Zhe Hong yun-fang Gao Hai-Dong Wang Jian-wei Ren sheng-Jie Peng Lei Li College of biological Chemical Sciences and EngineeringJiaxing UniversityJiaxing 314001China College of Chemical Engineering Zhejiang University of TechnologyHangzhou 310014China College of materials science and technology Nanjing University of Aeronautics and AstronauticsNanjing 210016China Research and Development Department Jiangxi Ganfeng LiEnergy Technology Co.Ltd.Xinyu 338000China Department of mechanical Engineering science University of JohannesburgAuckland ParkJohannesburg 2092South Africa

the convenient synthesis of the composite electrode with high supercapacitance performance plays an important role in practical application but is ***,the carbon nanotubes(CNts)coupled with lowcrystalline sulfur and nitrogen co-doped Ni Co-LDH(denoted as sN-Ni Co-LDH)nanosheets array are grown on Ni Co foam(NCF)substrate by two convenient steps of metal induced self-assembly and corrosion engineering,which present the advantages of operating at roomtemperature and low preparation *** from the s–N co-doping and low-crystallinity of Ni Co-LDH,the prepared sN-Ni Co-LDH@CNts@NCF electrode presents a topping charge capacity of 2470 C·g^(-1)(4.94 C·cm^(-2))at 5 m A·cm^(-2).Furthermore,the fabricated asymmetry supercapacitor(AsC)achieves an extraordinary energy density of 77 Wh·kg^(-1)(0.617 m Wh·cm^(-2))at a power density of 438 W·kg^(-1)(3.5 m W·cm^(-2))and outstanding stability(91%capacity retention after 5000 cycles at20 m A·cm^(-2)).Impressively,the structure evolution of Ni Co-LDH during the charge/discharge processes has been thoroughly elucidated by in-situ Raman ***,this work verifies a powerful strategy and practical value for preparing composite electrodes with high supercapacitance performance,and also provides guidance for the rational design of the smart electrodes.

关键词： supercapacitor NiCo-LDH Carbon nanotubes sulfur and nitrogen co-doped Convenient synthesis

Interface engineering strategy via electron-defect trimethyl borate additive toward 4.7 V ultrahigh-nickel LiNi_(0.9)Co_(0.05)mn_(0.05)O_(2)battery

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Journal of Energy Chemistry 2024年第5期92卷 639-647页

作者： yilin Zhang yuqing Chen Qiu He Jinlong Ke wei Wang Jian-fang Wu Peng Gao yanhua Li Jilei Liu College of materials science and Engineering Hunan Joint International Laboratory of Advanced Materials and Technology for Clean EnergyHunan Province Key Laboratory for Advanced Carbon Materials and Applied TechnologyHunan UniversityChangsha 410082HunanChina College of materials science and Engineering Sichuan UniversityChengdu 610065SichuanChina school of materials science and Engineering Hunan Institute of TechnologyHengyang 421002HunanChina

the Li metal battery with ultrahigh-nickel cathode(LiNi_(x)m_(1-x)O_(2),m=mn,Co,and x≥0.9)under high-voltage is regarded as one of the most promising approaches to fulfill the ambitious target of 400 Wh/***,the practical application is impeded by the instability of electrode/electrolyte interface and Ni-rich cathode *** we proposed an electron-defect electrolyte additive trimethyl borate(tmb)which is paired with the commercial carbonate electrolyte to construct highly conductive fluorine-and boron-rich cathode electrolyte interface(CEI)on LiNi_(0.9)Co_(0.05)mn_(0.05)O_(2)(NCm90)surface and solid electrolyte interphase(sEI)on lithium metal *** modified CEI effectively mitigates the structural transformation from layered to disordered rock-salt phase,and consequently alleviate the dissolution of transition metal ions(tms)and its“cross-talk”effect,while the enhanced sEI enables stable lithium plating/striping and thus demonstrated good compatibility between electrolyte and lithium metal *** a result,the common electrolyte with 1 wt%tmb enables 4.7 V NCm90/Li cell cycle stably over 100 cycles with 70%capacity *** work highlights the significance of the electron-defect boron compounds for designing desirable interfacial chemistries to achieve high performance NCm90/Li battery under high voltage operation.

关键词： NCm90 batteries Electrolyte additive trimethyl borate