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Journal of Energy Chemistry 2024年第6期93卷 16-23,I0002页

作者： Yihong Tong Ruicheng Cao Guanghui Xu Yifeng Xia Hongyuan Xu Hong Jin Hui Xu Xi’an Jiaotong University Suzhou Academy Suzhou 215123JiangsuChina Nano Science and Technology Institute University of Science and Technology of ChinaSuzhou 215123JiangsuChina

free-standing silicon anodes with high proportion of active materials have aroused great attention;however,the mechanical stability and electrochemical performance are severely ***,to resolve the appeal issues,a free-standing anode with a"corrugated paper"shape on micro-scale and a topological crosslinking network on the submicron and nano-scale is ***,an integrated three-dimensional electrode structure is constructed based on robust carbon nanotubes network with firmly anchored SiNPs via forming interlocking *** which,the hierarchical interlocking structure is achieved by directional induction of the binder,which ensures well integration during cycling so that significantly enhances mechanical stability as well as electronic and ionic conductivity of *** from it,this anode exhibits outsta nding performance under harsh service conditions including high Si loading,ultrahigh areal capacity(33.2 mA h cm^(-2)),and high/low temperatures(-15-60℃),which significantly extends its practical ***,the optimization mechanism of this electrode is explored to verify the crack-healing and structure-integration maintaining along cycling via a unique self-stabilization ***,from both the fundamental and engineering views,this strategy offers a promising path to produce high-performance free-standing electrodes for flexible device applications especially facing volume effect challenges.

关键词： Topological network Self-stabilization Flexibility free-standing Silicon anode

Reasonable Designing of free-standing MnO_(2)/Graphene Composite Membrane for Lithium-ion Storage

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Chemical Research in Chinese Universities 2024年第3期40卷 508-512页

作者： SHI Junye YU Chenxi ZOU Zewei ZHENG Shumin ZHANG Xing WANG Bao Institute of Refrigeration and Cryogenics Shanghai Jiao Tong University Shanghai 200433P.R.China State Key Laboratory of Biochemical Engineering Institute of Process EngineeringChinese Academy of SciencesBeijing 100190P.R.China Key Laboratory of Biopharmaceutical Preparation and Delivery Institute of Process EngineeringChinese Academy of SciencesBeijing 100190P.R.China CAS Key Laboratory of Molecular Nanostucture and Nanotechnology Institute of ChemistryChinese Academy of SciencesBeijing 100190P.R.China

free-standing membranes show extraordinary promise in energy storage applications,however are usually limited by low capacity and poor rate ***,we assembled a series of free-standing MnO_(2)/GO composite membranes with ZIF67 particles embedded between two-dimensional(2D)*** particle size of ZIF67 can be adjusted to achieve tunable interlayer *** lithium storage performance of the as-obtained membranes with different interlayer spaces was systematically *** MnO_(2)/GO composite membrane embedded with ZIF67 particles with an average diameter of 30 nm(denoted as MnO_(2)/nZIF67/GO)delivers a good long cycling performance,and it retains a capacity of 340.7 mA·h·g^(−1) after 400 cycles at 0.05 A/*** MnO_(2)/GO composite membrane embedded with ZIF67 particles with an average diameter of 500 nm(denoted as MnO_(2)/mZIF67/GO)exhibits good rate *** of the size of the ZIF67 particles,the performance of the membrane containing ZIF67 is significantly better than that of the membrane without ZIF67,indicating that the ZIF67 particles can enhance the lithium storage performance of the assembled *** work provides a method to fabricate a free-standing membrane for lithium storage with tunable electrochemical performance.

关键词： Lithium-ion battery Membrane free-standing ZIF67

In Situ Mineralization of Biomass-Derived Hydrogels Boosts Capacitive Electrochemical Energy Storage in free-standing 3D Carbon Aerogels

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Energy & Environmental Materials 2024年第2期7卷 363-375页

作者： Anjali Achazhiyath Edathil Babak Rezaei Kristoffer Almdal Stephan Sylνest Keller National Centre for Nano Fabrication and Characterization DTU Nanolab Technical University of Denmark DTU Chemistry Technical University of Denmark

Here,a novel fabrication method for making free-standing 3D hierarchical porous carbon aerogels from molecularly engineered biomass-derived hydrogels is *** situ formed flower-like CaCO3molecularly embedded within the hydrogel network regulated the pore structure during in situ mineralization assisted one-step activation graphitization（iMAG）,while the intrinsic structural integrity of the carbon aerogels was *** homogenously distributed minerals simultaneously acted as a hard template,activating agent,and graphitization *** decomposition of the homogenously distributed CaCO3during iWAG followed by the etching of residual CaO through a mild acid washing endowed a robust carbon aerogel with high porosity and excellent electrochemical *** 0.5 mA cm-2,the gravimetric capacitance increased from 0.01 F g-1without mineralization to 322 F g-1with iMAG,which exceeds values reported for any other free-standing or powder-based biomass-derived carbon *** outstanding cycling stability of ～104%after 1000 cycles in 1 M HCIO4was *** assembled symmetric supercapacitor device delivered a high specific capacitance of 376 F g-1and a high energy density of 26 W h kg-1at a power density of 4000 W kg-1,with excellent cycling performance（98.5% retention after 2000 cycles）.In combination with the proposed 3D printed mold-assisted solution casting（3DMASC）,iWAG allows for the generation of free-standing carbon aerogel architectures with arbitrary ***,the novel method introduces flexibility in constructing free-standing carbon aerogels from any ionically cross-linkable biopolymer while maintaining the ability to tailor the design,dimensions,and pore size distribution for specific energy storage applications.

关键词： biomass carbon aerogel sustainable energy materials free-standing supercapacitors

free-standing Na_(2)C_(6)O_(6)/MXene composite paper for highperformance organic sodium-ion batteries

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Nano Research 2023年第1期16卷 458-465页

作者： Zhengran Wang Yuchan Zhang Huiyu Jiang Chuanliang Wei Yongling An Liwen Tan Shenglin Xiong Jinkui Feng Key Laboratory for Liquid-Solid Structural Evolution&Processing of Materials(Ministry of Education) Research Center for Carbon NanomaterialsSchool of Materials Science and EngineeringShandong UniversityJinan 250061China Shenzhen Institute of Shandong University Shenzhen 518057China

Sodium-ion batteries(SIBs)are regarded as the ideal low-cost choice for next-generation large-scale energy storage ***-based organic salt-disodium rhodizonate(Na_(2)C_(6)O_(6))with high theoretical specific capacity(501 mAh·g−1)is considered as a promising cathode material for ***,the dissolution of active material in electrolyte and low electronic conductivity lead to rapidly capacity decay and poor rate ***,a simple method is designed to construct free-standing and flexible Ti3C2Tx Na2C6O6/MXene paper via vacuum-assisted filtration and antisolvent *** MXene can form an electronic conductive network,adsorb the active materials,and offer additional active sites for Na *** binder-free Na_(2)C_(6)O_(6)/MXene paper delivers excellent electrochemical property with a high rate performance of 231 mAh·g−1 at 1,000 mA·g−1 and a high capacity of 215 mAh·g−1 after 100 *** work provides an attractive strategy for designing high-performance organic electrode materials of SIBs.

关键词： sodium-ion batteries Na_(2)C_(6)O_(6) cathode MXene organic battery flexible free-standing

free-standing ultrathick LiMn_(2)O_(4)@single-wall carbon nanotubes electrode with high areal capacity

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Journal of Energy Chemistry 2022年第10期31卷 452-459,I0012页

作者： Yuntao Guo Xinhai Li Zhixing Wang Jiexi Wang Huajun Guo Guochun Yan School of Metallurgy and Environment Central South UniversityChangsha 410083HunanChina Engineering Research Center of the Ministry of Education for Advanced Battery Materials Central South UniversityChangsha 410083HunanChina Hunan Provincial Key Laboratory of Nonferrous Value-added Metallurgy Central South UniversityChangsha 410083HunanChina

The ever-increasing demands for advanced lithium-ion batteries with high energy density have greatly stimulated the pursuit of thick electrodes with high active material ***,it is not feasible to prepare thick electrodes with traditional coating methods due to mechanical ***,using single-wall carbon nanotubes(SWCNT)as conductive carbon and binder,free-standing LiMn_(2)O_(4) thick electrodes(F-LMO)with ultrahigh-mass loading up to~190 mg cm^(-2)were prepared by vacuum filtration combined with *** thick electrodes with~30 mg cm^(-2)mass loading achieved a high specific capacity of 106.7 mAh g^(-1)with a good capacity retention of 94%over 50 cycles at 0.5 C,which was superior to the traditional coating electrodes(~20 mg cm^(-2))of 99.3 mAh g^(-1)with 95%because of the enhanced electronic conductivity originated from *** addition,the high active material ratio of 97.5 wt%,near-theoretical reversible capacity,and high mass loading gave ultrathick F-LMO electrodes(600μm)of~190 mg cm^(-2)with a remarkable areal capacity of 20 mAh cm^(-2).Moreover,the concentration polarization that occurred in the thick F-LMO electrodes under high current density was discussed via electrochemical stimulation.

关键词： Thick electrodes free-standing High areal capacity Concentration polarization

free-standing SnNb_(2)O_(6)@CSN film as flexible anode for high performance sodium-ion batteries

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Chinese Chemical Letters 2023年第7期34卷 284-288页

作者： Xuemin Yin Tao Liu Xiuping Yin Xiaochen Feng Yiming Liu Qinhao Shi Xingli Zou Yufeng Zhao Institute for Sustainable Energy and College of Sciences Shanghai UniversityShanghai 200444China Department of Materials Science and Engineering Shanghai UniversityShanghai 200072China

free-standing electrodes are promising candidates for flexible rechargeable batteries, toward the application of flexible energy storage devices, due to their merits of additive-free, lightweight, and high energy density. Herein, we report a free-standing SnNb_(2)O_(6)@CSN flexible film with SnNb_(2)O_(6) encapsulated in 3D carbon skeleton nanofibers by electrospinning and carbonization processes as flexible anode for sodium-ion batteries(SIBs). The 3D carbon skeleton nanofibers serve as ion/electron transport pathway to improve the electrochemical reaction kinetics and meanwhile alleviate the volume changes of SnNb_(2)O_(6) during charge-discharge processes. The as-constructed half-cell(SnNb_(2)O_(6)@CSN‖Na) exhibits excellent cycling stability of 99.2 m Ah/g at 0.5 A/g after 950 cycles(coulombic efficiency of ~100%) and a high rate performance of 108.6 mAh/g at 10 A/g. In addition, the pouch cell can light up the LEDs at different bending angles(0°, 90°, 180°). This research shows a promising anode material for flexible energy storage electronics.

关键词： free-standing SnNb_(2)O_(6)@CSN Anode Sodium-ion batteries Flexible material

Potential and performance estimation of free-standing and building integrated photovoltaic technologies for different climatic zones of India

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能源与人工环境(英文) 2022年第1期3卷 40-55页

作者： Digvijay Singh Ajay Kumar Gautam Rubina Chaudhary School of Energy and Environmental Studies Devi Ahilya UniversityIndore 452001India

The role of Photovoltaic technologies integrated or attached to the building envelope is crucial in managing the building energy *** this paper,the performance of PV technologies with the mounting methods of Build-ing integrated and free-standing(Building attached)is discussed for six different climate zone of the country.A PVGIS program proposed with three PV cell technologies(Crystalline Silicon,Copper indium diselenide,Cad-mium Telluride)is used to evaluate monthly energy generation potential and losses of the 2 kW p grid-connected PV system at the latitude and 90°.A 2 kW p PV system is chosen for Economic Weaker Section(EWS)housing schemes depending upon the roof *** the evaluation,the performance parameter has been estimated.A new parameter Energy Deviation(ED),is proposed to choose the best PV technology in terms of *** results of ED agree with the parameters Performance Ratio(PR)and Capacity Factor(CF)defined under the IEC Standard *** potential generation of PV technologies at 90°varies from 41%(Warm and Humid)to 64%(Cold and Sunny)when compared with the *** case of Cold and Sunny and Cold and Cloudy at 90°,the generation performance of Copper indium diselenide is found better in Building integrated and free-standing mounting methods,*** the remaining zones,Cadmium Telluride technology shows better *** Percentage loss in the system is found to be minimum in the case of Cold and Sunny,varies between 17%and 25%,and maximum is found for Warm and Humid and varies between 23.2%and 33.4%for the proposed PV *** grid feed-in energy from these EWS houses for all the technologies and climatic zones is found above 45%.It is seen that the combined energy generation from the envelopes(Roof,walls,and facades)makes the houses energy plus in *** study has important implications for the government to promote the building integrated Photovoltaic policies in the country.

关键词： PV technologies Building Integrated free-standing Energy Deviation Performance Ratio Capacity Factor

free-standing ternary metallic sulphides/Ni/C-nanofiber anodes for high-performance lithium-ion capacitors

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Journal of Energy Chemistry 2020年第3期29卷 108-115页

作者： Ting Xing Yinghui Ouyang Liping Zheng Xianyou Wang Hong Liu Manfang Chen Ruizhi Yu Xingyan Wang Chun Wu National Base for International Science and Technology Cooperation National Local Joint Engineering Laboratory for Key Materials of New Energy Storage BatteryHunan Province Key Laboratory of Electrochemical Energy Storage and ConversionSchool of ChemistryXiangtan UniversityXiangtan 411105HunanChina College of Material Science and Engineering Changsha University of Science&TechnologyChangsha 410114HunanChina

As a promising energy-storage device,the hybrid lithium-ion capacitor coupling with both a large energy density battery-type anode and a high power density capacitor-type cathode is attracting great *** the sake of improving the energy density of hybrid lithium-ion capacitor,the free-standing anodes with good electrochemical performance are ***,we design an effective electrospinning strategy to prepare free-standing MnS/Co4S3/Ni3S2/Ni/C-nanofibers(TMSs/Ni/C-NFs)film and firstly use it as a binder-free anode for hybrid lithium-ion *** find that the carbon nanofibers can availably prevent MnS/Co4S3/Ni3S2/Ni nanoparticles from aggregation as well as significantly improve the electrochemical ***,the binder-free TMSs/Ni/C-NFs membrane displays an ultrahigh reversible capacity of 1246.9 m Ah g-1at 100 m A g-1,excellent rate capability(398 mAh g-1 at2000 mA g-1),and long-term cyclic ***,we further assemble the hybrid lithium-ion capacitor,which exhibits a high energy density of 182.0 Wh kg-1at 121.1 W kg-1(19.0 Wh kg-1 at 3512.5 W kg-1)and remarkable cycle life.

关键词： Electrospinning free-standing Ternary metallic sulphides Hybrid lithium-ion capacitor Energy density

free-standing hybrid films comprising of ultra-dispersed titania nanocrystals and hierarchical conductive network for excellent high rate performance of lithium storage

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Nano Research 2021年第7期14卷 2301-2308页

作者： Kunlei Zhu Chenyu Li Yushuang Jiao Jiawen Zhu Hongtao Ren Yufeng Luo Shoushan Fan Kai Liu College of Chemistry and Chemical Engineering Qufu Normal UniversityJingxuan West Road NO.57Qufu 273165China State Key Laboratory of New Ceramics and Fine Processing and Key Laboratory of Advanced Materials of Ministry of EducationSchool of Materials Science and EngineeringTsinghua UniversityBeijing 100084China School of Materials Science and Engineering Liaocheng UniversityHunan Road No.1Liaocheng 252000China Department of Physics and Tsinghua-Foxconn Nanotechnology Research Center Tsinghua UniversityBeijing 100084China

The construction of advanced electrode materials is key to the field of energy ***,a free-standing anatase titania(TiO_(2))nanocrystal/carbon nanotube(CNT)film is reported using a simple and scalable sol-gel method,followed by *** unique free-standing film comprises ultra-small TiO_(2) nanocrystals(~5.9 nm)and super-aligned CNTs,with ultra-dispersed TiO_(2) nanocrystals on the surfaces of the *** the one hand,these TiO_(2) nanocrystals can significantly decrease the diffusion distance of the charges and on the other hand,the cross-linked CNTs can act as a three-dimensional(3D)conductive network,allowing the fast transport of *** addition,the film is free-standing,without requiring electrode fabrication and additional conductive agents and *** to these above synergistic effects,the film is directly used as an anode in Li-ion batteries,and delivers a high discharge capacity of~105 mAh·g^(−1) at high rate of 60 C(1 C=170 mA·g^(−1))and excellent cycling performance over 2,500 cycles at 30 *** results indicate that the free-standing anatase TiO_(2) nanocrystal/CNT film affords a superior performance among the various TiO_(2) materials and can be a promising anode material for fast-charging Li-ion ***,the TiO_(2)/CNT film exhibits an areal capacity of up to 2.4 mAh·cm^(−2),confirming the possibility of its practical use.

关键词： carbon nanotubes free-standing high rate Li-ion batteries TiO_(2) ultra-small

free-standing N-doped hollow carbon fibers as high-performance anode for potassium ion batteries

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Science China Materials 2021年第3期64卷 547-556页

作者： Suhua Chen Yanhong Feng Jue Wang Erjin Zhang Xinzhi Yu Bingan Lu School of Physics and Electronics Hunan UniversityChangsha410082China College of Chemistry and Chemical Engineering Central South UniversityChangsha410083China Key Laboratory of Advanced Design and Manufacturing for Vehicle Body Hunan UniversityChangsha410082China

A novel hierarchical architecture—N-doped hollow carbon fibers decorated with N-doped carbon clusters(NHCF@NCC)—was synthesized for high-performance anode material of potassium ion batteries(PIBs).The material is formulated with porous N-doped hollow carbon fibers as the backbone,which effectively shortens the diffusion length of potassium ion and increases the interface between the electrode and *** addition,the N-doped carbon clusters attached on the hollow carbon fibers can provide abundant reactive ***,NHCF@NCC could form a freestanding electrode with a three dimensional interconnected conductive network owing to the ultrahigh aspect *** this way,NHCF@NCC delivers an excellent electrochemical performance as free-standing anode materials of PIBs,exhibiting a high reversible capacity of 310 mA h g^−1 at a current density of 100 mA g^−1,a long cycling stability of 1000 cycles with negligible degradation,and a superior rate performance of 153 mA h g^−1 at a large current density of 2000 mA g^−1.

关键词： potassium anode n]N-doped hollow carbon fibers N-doped carbon cluster free-standing