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Mitigating volume expansion of silicon-based anode through interfacial engineering based on intermittent discharge strategy

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Journal of Energy Chemistry 2024年第11期98卷 680-691页

作者： Chunlei Li Yu Zhu Yin Quan Feifei Zong Jie Wang Dongni Zhao Ningshuang Zhang Peng Wang Xiaoling Cui Shiyou Li School of Petrochemical Technology Lanzhou University of TechnologyLanzhou 730050GansuChina Key Laboratory of Low Carbon Energy and Chemical Engineering of Gansu Province Lanzhou 730050GansuChina Gansu Engineering Laboratory of Cathode Material for Lithium-ion Battery Baiyin 730900GansuChina

Silicon is considered to be one of the most promising anode materials for lithium-ion batteries(LIBs),but its application is limited by the large volume expansion during alloying and *** constructing of a high-performance solid electrolyte interface(SEI) film on the surface of the anode material is considered to be one of the effective strategies to mitigate volume expansion of silicon-based *** this study,an intermittent discharge strategy which helps to improve the utilization efficiency of electrolyte additive of lithium difluorobisoxalate phosphate(LiDFBOP) is proposed to construct a highly conductive and dense SEI *** results of electrochemical and physical characterization and theoretical calculations show that the intermittent discharge in the voltage range from open circuit voltage(OCV) to 1.8 V facilitates the diffusion of the soluble products,creates the conditions for the repeated direct contact between Si@C anode and LiDFBOP additive,increases the decomposition of LiDFBOP additive,and thus produces a uniform,dense and inorganics-rich(Li_(2)C_(2)O_(4),LiF and Li_(x)PO_yF_z) SEI ***,this SEI film helps to ensure the even intercalation/de-intercalation of Li^(+) in the SEI film and the homogeneous diffusion of Li^(+) inside the Si particles,decreasing the internal stresses and anisotropic phase transitions,maintaining the integrity of Si particles,inhibiting the volume expansion and thu s improving the electrochemical performance of *** study not only improves the utilization efficiency of expensive additives through a simply and low-cost method,but also enriches the strategy to improve the electrochemical performance of Si@C anode through interfacial engineering.

关键词： Si@C anode Lithium difluoro(bisoxalato)phosphate Intermittent discharge Solid electrolyte interface volume expansion

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The mitigation of pitch-derived carbon with different structures on the volume expansion of silicon in Si/C composite anode

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Journal of Energy Chemistry 2023年第9期84卷 292-302页

作者： Xin Xue Xiao Liu Bin Lou Yuanxi Yang Nan Shi FuShan Wen Xiujie Yang Dong Liu State Key Laboratory of Heavy Oil Processing China University of PetroleumQingdao 266580ShandongChina Department of Chemical Engineering University College London Torrington Place London WC1E7JEUK

The microstructures of carbon precursors significantly affect the electrochemical performance of Si/C composite ***,the interaction between Si and carbon materials with different structures is still ***-based materials undergoing different thermal treatments are superior sources for synthesizing carbons with different ***,different types of mesophase pitch(domain,flow-domain and mosaic structure) obtained from controllable thermal condensation are utilized to prepare Si/C composite materials and the corresponding models are established through finite element simulation to explore the correlation between the lithium storage properties of Si/C composites and the structures of carbon *** results indicate that the flow-domain texture pitch P2 has a better ability to buffer the volume expansion of silicon particles for its highly ordered arrangement of carbon crystallites inside could disperse the swelling stress uniformly alongside the particle *** sample Si@P2 exhibits the highest capacity of 1328 mA h/g after 200 cycles at a current density of 0.1 A/g as well as the best rate performance and *** sample Si@P3 in which the mosaic texture pitch P3 composed of random orientation of crystallites undergoes the fastest capacity *** findings suggest that highly ordered carbon materials are more suitable for the synthesis of Si/C composite anodes and provide insights for understanding the interaction between carbon and silicon during the charging/discharging process.

关键词： Si/C composite materials Mesophase pitch Finite element simulation volume expansion

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Structural Designs for Accommodating volume expansion in Sodium Ion Batteries

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Chinese Journal of Chemistry 2018年第9期36卷 866-874页

作者： Wenjie Wang Xiaohui Zhu Yujing Zhang Yongiun Liu Qin Zhang Lei Fu College of Chemistry and Molecular Science Wuhan University Wuhan Hubei 430072 China The Institute for Advanced Studies (IAS) Wuhan University WuhanHubei 430072 China

T At the forefront of energy storage field, developing sodium ion batteries （SIBs） has drew a wide concern due to relatively low cost and abundant resource, comparing with lithium ion batteries （LIBs）. Serious volume expansion constraints the electrochemical performance of the conver- sion/alloying materials, despite of their high reversible capacities or theoretical capacities. Here, from the perspective of structural designs, we systemat- ically study four types of routes to accommodate volume expansion. Delicate and peculiar nanostructures based on nanocrystallization engineering are widely focused on, covering nanosheet assembly and nanoarray construction. Robust materials such as carbon-based materials can be utilized as the buffer matrix, mitigating the mechanical stress during the charge/discharge process. Besides, recent studies have demonstrated void space reservation in nanostructures was also beneficial for adapting to volume changes. Moreover, for conversion materials, numerous works have confirmed the advanta- geous influence of interlayer spacing regulation. We also explained the superiority and challenges for further giving scope to structural designs. Sketching out the future studies in SIBs, in situ characterizations are supposed to be highlighted, as well as in-depth researches on the stress evolution caused by volume expansion.

关键词： sodium ion batteries volume expansion structural design buffer matrix void space

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Role of renal proximal tubule transport in thiazolidinedioneinduced volume expansion

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World Journal of Nephrology 2012年第5期1卷 146-150页

作者： George Seki Yoko Endo Masashi Suzuki Hideomi Yamada Shoko Horita Toshiro Fujita Department of Internal Medicine Faculty of Medicine University of Tokyo 7-3-1 Bunkyo-ku Hongo Tokyo 113-0033 Japan

Thiazolidinediones （TZDs）, pharmacological activa-tors of peroxisome-proliferator-activated receptors γ （PPARγ）, significantly improve insulin resistance and lower plasma glucose concentrations. However, the use of TZDs is associated with plasma volume expansion, the mechanism of which has been a matter of contro-versy. Originally, PPARγ-mediated enhanced transcrip-tion of the epithelial Na channel （ENaC） γ subunit was thought to play a central role in TZD-induced volume expansion. However, later studies suggested that the activation of ENaC alone could not explain TZD-induced volume expansion. We have recently shown that TZDs rapidly stimulate sodium-coupled bicarbonate absorp-tion from renal proximal tubule （PT） in vitro and in vivo. TZD-induced transport stimulation was dependent on PPARγ/Src/EGFR/ERK, and observed in rat, rabbit and human. However, this stimulation was not observed in mouse PTs where Src/EGFR is constitutively activated. Analysis in mouse embryonic fbroblast cells confrmed the existence of PPARγ/Src-dependent non-genomic signaling, which requires the ligand binding ability but not the transcriptional activity of PPARγ. The TZD-in-duced enhancement of association between PPARγ and Src supports an obligatory role for Src in this signal-ing. These results support the view that TZD-induced volume expansion is multifactorial. In addition to the PPARγ-dependent enhanced expression of the sodium transport system（s） in distal nephrons, the PPARγ-dependent non-genomic stimulation of renal proximal transport may be also involved in TZD-induced volume expansion.

关键词： Thiazolidinediones Peroxisome-proliferator-activated receptors γ volume expansion Edema NBCe1 NHE3 Epithelial Na channel

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Dynamics of vascular volume and hemodilution of lactated Ringer’s solution in patients during induction of general and epidural anesthesia

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Journal of Zhejiang University-Science B(Biomedicine & Biotechnology) 2006年第9期7卷 738-744页

作者： LI Yu-hong LOU Xian-feng BAO Fang-ping Department of Anesthesiology the First Affiliated Hospital School of Medicine Zhejiang University Hangzhou 3 10003 china Department of Orthopedics the First Affiliated Hospital School of Medicine Zhejiang university Hangzhou 310003 china

Objective： To investigate the dynamics of vascular volume and the plasma dilution of lactated Ringer＇s solution in patients during the induction of general and epidural anesthesia. Methods： The hemodilution of i.v. infusion of 1000 ml of lactated Ringer＇s solution over 60 min was studied in patients undergoing general （n=31） and epidural （n= 22） anesthesia. Heart rate, arterial blood pressure and hemoglobin （Hb） concentration were measured every 5 rain during the study. Surgery was not started until the study period had been completed. Results： General anesthesia caused the greater decrease of mean arterial blood pressure （MAP）（mean 15% versus 9%; P〈0.01） and thereby followed by a more pronounced plasma dilution, blood volume expansion （VE） and blood volume expansion efficiency （VEE）. A strong linear correlation between hemodilution and the reduction in MAP （r=-0.50;P〈0.01） was found. At the end of infusion, patients undergoing general anesthesia retained 47% （SD 19%） of the infused fluid in the circulation, while epidural anesthesia retained 29% （SD 13%）（P〈0.001）. Correspondingly, a fewer urine output （mean 89 ml versus 156 ml; P〈0.05） and extravascular expansion （454 ml versus 551 ml; P〈0.05） were found during general anesthesia. Conclusion： We concluded that the induction of general anesthesia caused more hemodilution, volume expansion and volume expansion efficiency than epidural anesthesia, which was triggered only by the lower MAP.

关键词： Hemodilution volume expansion Ringer's solution General anesthesia Epidural anesthesia

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Enhanced electrochemical performance of Si/C electrode through surface modification using SrF_(2) particle

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International Journal of Minerals,Metallurgy and Materials 2021年第10期28卷 1621-1628页

作者： Jun Yang Yuan-hua Lin Bing-shu Guo Ming-shan Wang Jun-chen Chen Zhi-yuan Ma Yun Huang Xing Li School of New Energy and Materials Southwest Petroleum UniversityChengdu 610500China

The silicon-based material exhibits a high theoretical specific capacity and is one of the best anode for the next generation of advanced lithium-ion batteries(LIBs).However,it is difficult for the silicon-based anode to form a stable solid-state interphase(SEI)during Li alloy/de-alloy process due to the large volume change(up to 300%)between silicon and Li4.4Si,which seriously limits the cycle life of the ***,we use strontium fluoride(SrF_(2))particle to coat the silicon-carbon(Si/C)electrode(SrF_(2)@Si/C)to help forming a stable and high mechanical strength SEI by spontaneously embedding the SrF_(2) particle into *** the formed SEI can inhibit the volume expansion of the silicon-carbon anode during the *** electrochemical test results show that the cycle performance and the ionic conductivity of the SrF_(2)@Si/C anode has been significantly *** X-ray photoelectron spectroscopy(XPS)analysis reveals that there are fewer electrolyte decomposition products formed on the surface of the SrF_(2)@Si/C *** study provides a facile approach to overcome the problems of Si/C electrode during the electrochemical cycling,which will be beneficial to the industrial application of silicon-based anode materials.

关键词： silicon-based anode volume expansion strontium fluoride solid electrolyte interface cycling stability

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Ni-P-SBR composite-electroless-plating enables Si anode with high conductivity and elasticity for high performance Li-ion batteries application

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Journal of Energy Chemistry 2023年第1期76卷 59-66,I0003页

作者： Yuxiao Wang Jian Gou Hongzhang Zhang Xiaofei Yang Huamin Zhang Xianfeng Li Dalian Institute of Chemical Physics Chinese Academy of SciencesDalian 116023LiaoningChina University of Chinese Academy of Sciences Beijing 100039China

Silica-based anode is widely employed for high energy density Li-ion batteries owing to their high theoretical specific capacity(4200 m A h g-1).However,it is always accompanied by a huge volume expansion(300%)and shrinks during the lithiation/delithiation process,further leading to low cycle *** to mitigate the adverse effects caused by volume expansion such as robust binder matrix,Coreshell structure,etc.,inevitably affect the electronic conductivity within the ***,a high conductivity and elasticity Si anode(Ni-P-SBR(styrene-butadiene rubber)@Si)was designed and fabricated via the Ni-P-SBR composite-electroless-plating *** this design,the Si particles are surrounded by SBR polymer and Ni particles,where the SBR can adapt to the volume change and Ni particles can provide the electrode with high electronic ***,the Ni-P-SBR@Si delivers a high initial capacity of 3470 m A h g-1and presents capacity retention of 49.4%within 200 cycles at 600 m A ***,a high capacity of 1153 m A h g-1can be achieved at 2000 m A g-1and can be cycled stably under bending *** strategy provides feasible ideas to solve the key issues that limit the practical application of Si anodes.

关键词： Silicon anode volume expansion Composite-electroless-plating High elasticity High electronic conductivity

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Yolk-Shell P3-Type K_(0.5)[Mn_(0.85)Ni_(0.1)Co_(0.05)]O_(2):A Low-Cost Cathode for Potassium-Ion Batteries

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Energy & Environmental Materials 2022年第1期5卷 261-269页

作者： Jiaxin Hao Ke Xiong Jiang Zhou Apparao M.Rao Xianyou Wang Huan Liu Bingan Lu School of Physics and Electronics State Key Laboratory of Advanced Design and Manufacturing for Vehicle BodyHunan UniversityChangsha 410082China Key Laboratory of Environmentally Friendly Chemistry and Applications of Ministry of Education Hunan Province Key Laboratory of Electrochemical Energy Storage and ConversionSchool of ChemistryXiangtan UniversityXiangtan 411105China School of Materials Science and Engineering Central South UniversityChangsha 410083China Department of Physics and Astronomy Clemson Nanomaterials InstituteClemson UniversityClemson SC 29634USA College of Materials Science and Engineering Hunan University of Scienceand TechnologyXiangtan 411201China Fujian Strait Research Institute of Industrial Graphene Technologies Quanzhou 362000China

Low-cost preparation methods for cathodes with high capacity and long cycle life are crucial for commercializing potassium-ion batteries(PIBs).Presently,the charging/discharging strain that develops in the active cathode material of PIBs causes cracks in the particles,leading to a sharp capacity ***,to abate the strain release and the need for an industrially relevant process,a simple low-cost co-precipitation method for synthesizing yolk-shell P3-type K_(0.5)[Mn_(0.85)Ni_(0.1)Co_(0.05)]O_(2) (YS-KMNC)was *** cathode material for PIBs,the YS-KMNC delivers a high reversible capacity(96 mAh g^(-1) at 20 mA g^(-1))and excellent cycle stability(80.5%retention over 400 cycles at a high current density of 200 mA g^(-1)).More importantly,a full battery assembled with the YS-KMNC cathode and a commercial graphite anode exhibits a high operating voltage(0.5-3.4 V)and an excellent cycling performance(84.2%retention for 100 cycles at 100 mA g^(-1)).Considering the low-cost,simple production process and high performance of YS-KMNC cathode,this work could pave the way for the commercial development of PIBs.

关键词： cathode materials K_(0.5)[Mn_(0.85)Ni_(0.1)Co_(0.05)]O_(2) strain release volume expansion yolk-shell structure

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Low-temperature oxidation behavior of MoSi_2 powders

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Journal of University of Science and Technology Beijing 2007年第6期14卷 558-561页

作者： Peizhong Feng Xuanhui Qu Islam S. Humail Xueli Du State Key Laboratory for Advanced Metals and Materials University of Science and Technology Beijing Beijing 100083 China School of Materials Science and Engineering China University of Mining and Technology Xuzhou 221116 China

The oxidation behavior of molybdenum disilicide （MoSi2） powders at 400, 500, and 600℃ for 12 h in air were investigated by using X-ray diffraction （XRD） and transmission electron microscopic （TEM） techniques. Significant changes were observed in volume, mass, and color. Especially at 500℃, the volume expansion was found to be as high as 7-8 times, the color changed from black to yellow-white, and the mass gain was about 169.34% after 8 h, with SiO2 and MoO3 as main reaction products. The gains in volume and mass were less at 400 and 600℃ compared with those at 500℃, probably due to the less reaction rate at 400℃ and the formation of silica glass scale at 600℃, which would protect the matrix and restrain the diffusion of oxygen and molybdenum. Thus, the accelerated oxidation behavior of MoSi2 powder appeared at 500℃ and the volume expansion was the sign of accelerated oxidation.

关键词： molybdenum disilicide low-temperature oxidation accelerated oxidation volume expansion

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Development and Field Application of Phosphogypsum-Based Soil Subgrade Stabilizers

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Journal of Renewable Materials 2022年第8期10卷 2247-2261页

作者： Hongfei Yue Aiguo Fang Sudong Hua Zenghuan Gu Yu Jia Cheng Yang College of Materials Science and Engineering Nanjing Tech UniversityNanjing211800China China Construction Installaction Engineering Co. Ltd.Nanjing210023China Jiangsu Subote New Material Co. Ltd.Nanjing211103China Sinoma Construction Co. Ltd.Suzhou215300China

A phosphogypsum-based subgrade stabilizer(PBSS)was formulated using industrial by-product phosphogypsum(PG),mixed with slag and calcium-silicon-rich active material(GSR).The active powder(AP)was used to modify PBSS,and PBSS-AP was *** and PBSS-AP were each mixed with 10%silty soil,and cement and lime(CAL:5%lime+2%cement)were used as the traditional material for comparative *** were cured under standard conditions,and tested for unconfined compressive strength(UCS),water stability,volume expansion,and leachate,to explore the stabilization effect of the three solidified materials on silty *** results showed that the comprehensive performance of sility soil mixed with 12%PBSS-AP was the *** CaO,SiO_(2)and Al_(2)O_(3)provided by PG,Slag and GSR will react with water to form a stable C-S-H gel,which is conducive to stabilizing the *** application results showed that the compaction exceeded 95%,the deflection was 144.9 mm,and UCS was 2.5 MPa after 28 *** findings indicated that PBSS-AP is an effective stabilizer for subgrade soils.

关键词： Phosphogypsum solidified material unconfined compressive strength water stability volume expansion leachate

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