A Li_(3)P nanoparticle dispersion strengthened ultrathin Li metal electrode for high energy density rechargeable batteries  

作　　者：Lin Fu Xiancheng Wang Bao Zhang Zihe Chen Yuanjian Li Yongming Sun 

机构地区：[1]Provincial Guizhou Key Laboratory of Green Chemical and Clean Energy Technology,School of Chemistry and Chemical Engineering,Guizhou University,Guiyang 550025,China [2]Wuhan National Laboratory for Optoelectronics,Huazhong University of Science and Technology,Wuhan 430074,China [3]School of Physical and Mathematical Sciences,Nanyang Technological University,Singapore 637371,Singapore [4]Institute of Materials Research and Engineering,Agency for Science Technology and Research(A*STAR),Singapore 138634,Singapore

出　　处：《Nano Research》2024年第5期4031-4038,共8页纳米研究（英文版）

基　　金：Y.S.acknowledges the financial support by National Natural Science Foundation of China(No.52272207);L.F.thanks the financial support by National Natural Science Foundation of China(No.22209031);Guizhou Provincial Basic Research Program(Natural Science)(No.QKHJC-ZK[2023]YB046);Natural Science Special Foundation of Guizhou University(No.X2022122 Special Post B).

摘　　要：Achievement of lithium(Li)metal anode with thin thickness(e.g.,≤30µm)is highly desirable for rechargeable high energy density batteries.However,the fabrication and application of such thin Li metal foil electrode remain challenging due to the poor mechanical processibility and inferior electrochemical performance of metallic Li.Here,mechanico-chemical synthesis of robust ultrathin Li/Li_(3)P(LLP)composite foils(~15µm)is demonstrated by employing repeated mechanical rolling/stacking operations using red P and metallic Li as raw materials.The in-situ formed Li+-conductive Li_(3)P nanoparticles in metallic Li matrix and their tight bonding strengthen the mechanical durability and enable the successful fabrication of free-standing ultrathin Li metal composite foil.Besides,it also reduces the electrochemical Li nucleation barrier and homogenizes Li plating/stripping behavior.When matching to high-voltage LiCoO_(2),the full cell with a low negative/positive(N/P)capacity ratio of~1.5 offers a high energy density of~522 W·h·kg^(-1) at 0.5 C based on the mass of cathode and anode.Taking into account its facile manufacturing,potentially low cost,and good electrochemical performance,we believe that such an ultrathin composite Li metal foil design with nanoparticle-dispersion-strengthened mechanism may boost the development of high energy density Li metal batteries.

关 键 词：lithium metal anode high energy density battery mechanico-chemical synthesis ultrathin Li/Li_(3)P composite foil low negative/positive capacity ratio 

分 类 号：TB383[一般工业技术—材料科学与工程]