Nanodiamond-Assisted High Performance Lithium and Sodium Ions Co-Storage  

作　　者：Xiaochen Sun Xuan Gao Chang Su Wei Cheng Nan Gao Xin Zhang Mengmeng Gong Haobo Dong Yuhang Dai Guanjie He Hongdong Li 

机构地区：[1]State Key Lab of Superhard Materials,College of Physics,Jilin University,Changchun,130012 China [2]Christopher Ingold Laboratory,Department of Chemistry,University College London,20 Gordon Street,London,WC1H 0AJ UK [3]Nuffield College,University of Oxford,New Road,Oxford OX11NF,UK

出　　处：《Energy & Environmental Materials》2024年第6期94-105,共12页能源与环境材料（英文）

基　　金：supported by the National Natural Science Foundation of China(NSFC)(No.52172044);Jilin Provincial Key Research and Development Plan Project(No.20230201151 GX);the Engineering and Physical Sciences Research Council(EPSRC,EP/V027433/3).

摘　　要：While lithium resources are scarce for high energy-dense lithium-ion batteries(LIBs),sodium-ion batteries(SIBs),serving as an alternative,inherently suffer from low capacity and the high-cost use of non-graphite anodes.Combining Li-and Na-ions within a single battery system is expected to mitigate the shortcomings of both systems while leveraging their respective advantages.In this study,we developed and assembled a nanodiamonds(NDs)-assisted co-Li/Na-ion battery(ND–LSIB).This innovative battery system comprised a commercial graphite anode,an ND-modified polypropylene(DPP)separator,a hybrid lithium/sodium-based electrolyte,and a cathode.It is theoretically and experimentally demonstrated that the ND/Li co-insertion can serve as an ion-drill opening graphite layers and reconstructing graphite anodes into few-layered graphene with expanding interlayer space,achieving highly efficient Li/Na storage and the theoretical maximum of LiC_(6)for Li storage in graphite.In addition,ND is helpful for creating a LiF-/NaF-rich hybrid solid electrolyte interface with improved ionic mobility,mechanical strength,and reversibility.Consequently,ND–LSIBs have higher specific capacities~1.4 times the theoretical value of LIBs and show long-term cycling stability.This study proposes and realizes the concept of Li/Na co-storage in one ion battery with compatible high-performance,cost-effectiveness,and industrial prospects.

关 键 词：BATTERY LITHIUM ELECTROLYTE 

分 类 号：TM912[电气工程—电力电子与电力传动]