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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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highly elastic wrinkled structures for stable and low volume-expansion lithium-metal anodes

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Science China Materials 2021年第11期64卷 2675-2682页

作者： Wenwen Lu Huicong Yang Jing Chen Chihang Sun Feng Li Shenyang National Laboratory for Materials Science Institute of Metal ResearchChinese Academy of SciencesShenyang 110016China School of Materials Science and Engineering University of Science and Technology of ChinaShenyang 110016China

Lithium(Li)metal is promising for high energy density batteries due to its low electrochemical redox potential and high specific ***,the formation of dendrites and its tendency for large volume expansion during plating/stripping restrict the application of Li metal in practical *** this work,we developed reduced graphene oxide-graphitic carbon nitride(rGO-C3N4,GCN)with highly elastic and wrinkled structure as the current *** site C3N4 in GCN could reduce the nucleation *** addition,this material effectively inhibited electrode expansion during *** the same time,due to its high elasticity,GCN could release the stress induced by Li deposition to maintain structural integrity of the *** anodes with GCN exhibited small volume expansion,high Coulombic efficiency(CE)of 98.6%within 300 cycles and long cycling life of more than 1700 *** work described and demonstrated a new approach to construct flexible current collectors for stable lithium-metal anodes.

关键词： lithium-metal anode 3D current collector high elasticity

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