Stoichiometric Ti3C2Tx Coating for Inhibiting Dendrite Growth in Anode-Free Lithium Metal Batteries

扫码查看

原文链接

NETL
NSTL
万方数据

外文摘要：Lithium metal batteries(LMBs)and anode-free LMBs(AFLMBs)present a solution to the need for batteries with a significantly superior theoretical energy density.However,their adoption is hindered by low Coulombic efficiency(CE)and rapid capacity fading,primarily due to the formation of unstable solid electrolyte interphase(SEI)layer and Li dendrite growth as a result of uneven Li plating.Here,we report on the use of a stoichiometric Ti3C2Tx(S-Ti3C2Tx)MXene coating on the copper current collector to enhance the cyclic stability of an anode-free lithium metal battery.The S-Ti3C2Tx coating provides abundant nucleation sites,thereby lowering the overpotential for Li nucleation,and promoting uniform Li plating.Additionally,the fluorine(-F)termination of S-Ti3C2Tx participates in the SEI formation,producing a LiF-rich SEI layer,vital for stabilizing the SEI and improving cycle life.Batteries equipped with S-Ti3C2Tx@Cu current collectors displayed reduced Li consumption during stable SEI formation,resulting in a significant decrease in capacity loss.AFLMBs with S-Ti3C2Tx@Cu current collectors achieved a high initial capacity density of 4.2 mAh cm 2,70.9％capacity retention after 50 cycles,and an average CE of 98.19％in 100 cycles.This innovative application of MXenes in the energy field offers a promising strategy to enhance the performance of AFLMBs and could potentially accelerate their commercial adoption.

外文关键词：

anode-free lithium metal batteriesstoichiometric MXenesolid electrolyte interphasesurface terminations

作者：

Xiangrong Zeng、Manmatha Mahato、Woong Oh、Hyunjoon Yoo、Van Hiep Nguyen、Saewoong Oh、Geetha Valurouthu、Soon-Ki Jeong、Chi Won Ahn、Yury Gogotsi、Il-Kwon Oh

展开 >

作者单位：

National Creative Research Initiative for Functionally Antagonistic Nano-Engineering Department of Mechanical Engineering Korea Advanced Institute of Science and Technology,(KAIST),291 Daehak-ro,Yuseong-gu,Daejeon 34141,Korea

Department of Materials Science & Engineering and A.J.Drexel Nanomaterials Institute,Drexel University,Philadelphia,Pennsylvania 19104,USA

Department of Energy Engineering Soonchunhyang University,22,Soonchunhyang-ro,Sinchang-myeon,Asan-si,Chungcheongnam-do 31538,Korea

National Nanofab Center(NNFC),Korea Advanced Institute of Science and Technology,(KAIST),291 Daehak-ro,Yuseong-gu,Daejeon 34141,Korea

展开 >

基金：

Creative Research Initiative ProgramNational Research Foundation of Korea(NRF)LG energy solution-KAIST Frontier Research Laboratory(2022)National Research Foundation of Korea(NRF)grantsNational Research Foundation of Korea(NRF)grantsSemiconductor-Secondary Battery Interfacing Platform Technology Development Project of NNFC

项目编号：

2015R1A3A2028975MSITNRF-2021M3H4A1A03047333

出版年：

2024

DOI：

10.1002/eem2.12686

能源与环境材料(英文)

ISSN：

年,卷(期)：2024.7(4)