Lithium dextran sulfate as dynamic and sustainable coating to stabilize lithium deposition

Li, Zhiqiang1; Gu, Shuai1; Liao, Kemeng1; Wang, Hongzhi1; Yin, Lihong1; Cao, Yulin1; Qin, Ning1; Gan, Qingmeng1; Li, Yingzhi1; Wang, Zhenyu1; Yin, Shu2,3; Lu, Zhouguang1

2023-06-01

10.1016/j.mtener.2023.101298

MATERIALS TODAY ENERGY   影响因子和分区

2468-6069

Lithium metal batteries (LMBs) are attractive because of ultra-high energy density, but the critical problem of lithium dendrites hinders their commercialization. Intensive researches have been devoted to homogenizing the electron distribution of the current collectors to prevent the lithium dendrite. In this work, a renewable lithium dextran sulfate (LDS) binder that can reversibly, dynamically, and strongly bind to the Cu current collectors as well as metallic Li through the -O-SO3- functional group, and has the special characteristic of single-ion-conducting is proposed to regulate homogeneous Li-ion diffusion, stabilize the electrode interface, and considerably decrease the surface stress, thus guide uniform lithium deposition and propagation, endowing the lithium-free LMBs with outstanding areal capacity and cycling stability. The full cells employing the LDS coated Cu foil as Li-free anode and 4.6 V LiCoO2 (LCO) as cathode exhibit an initial capacity of 189 mAh/g with a Coulombic efficiency (CE) of 97%. And the CE increases to more than 99.7% after 20 cycles. The reversible capacity retention rate was more than 72.1% after 100 cycles. This simple strategy of ion distribution homogenization by dynamic binder coating is inspiring to tackle the long-standing problem of metal dendrites for commercial feasibility of anode-free batteries. (c) 2023 Elsevier Ltd. All rights reserved.

Lithium metal batteries Lithium-free anode Lithium dendrites Dynamic binders Interface stabilization

SCI

英语

第一 ; 通讯

Basic Research Project of the Science and Technology Innovation Commission of Shenzhen[JCYJ 20220818100418040] ; Shenzhen Key Labora- tory of Interfacial Science and Engineering of Materials[ZDSYS20200421111401738] ; Stable Support Plan Program of Shenzhen Natural Science Fund[20200925154236004] ; Jiangsu Key Laboratory of Electrochemical Energy Storage Technologies[EEST2021-1] ; National Natural Science Foundation of China[U22A20439]

Chemistry ; Energy & Fuels ; Materials Science

Chemistry, Physical ; Energy & Fuels ; Materials Science, Multidisciplinary

WOS:000983412700001

ELSEVIER SCI LTD

Web of Science

1.Southern Univ Sci & Technol, Dept Mat Sci & Engn, Shenzhen Key Lab Interfacial Sci & Engn Mat, Shenzhen 518055, Guangdong, Peoples R China
2.Tohoku Univ, Inst Multidisciplinary Res Adv Mat IMRAM, 2-1-1 Katahira,Aoba Ku, Sendai, Japan
3.Tohoku Univ, Adv Inst Mat Res WPI AIMR, 2-1-1 Katahira,Aoba Ku, Sendai, Japan

Li, Zhiqiang,Gu, Shuai,Liao, Kemeng,et al. Lithium dextran sulfate as dynamic and sustainable coating to stabilize lithium deposition[J]. MATERIALS TODAY ENERGY,2023,34.

Li, Zhiqiang.,Gu, Shuai.,Liao, Kemeng.,Wang, Hongzhi.,Yin, Lihong.,...&Lu, Zhouguang.(2023).Lithium dextran sulfate as dynamic and sustainable coating to stabilize lithium deposition.MATERIALS TODAY ENERGY,34.

Li, Zhiqiang,et al."Lithium dextran sulfate as dynamic and sustainable coating to stabilize lithium deposition".MATERIALS TODAY ENERGY 34(2023).