Thermally reduced graphene paper with fast Li ion diffusion for stable Li metal anode

Yu, Yikang1,2; Huang, Wei3; Song, Xing1; Wang, Wenhui1; Hou, Zhen1; Zhao, Xixia1; Deng, Kerong1; Ju, Huanxin4; Sun, Yugang2; Zhao, Yusheng5; Lu, Yi-Chun3; Quan, Zewei1

2019-01-20

10.1016/j.electacta.2018.10.117

ELECTROCHIMICA ACTA   影响因子和分区

0013-4686

1873-3859

The increasing demand for high-specific-energy batteries drives researchers to revisit Li metal anode. However, the formation and growth of Li-dendrite possibly leads to short-circuit of the battery, causing safety hazard of Li metal batteries. Therefore, it is quite necessary to regulate the plating/ stripping behaviors of Li metal anodes to address this long-standing issue. Herein, we report the regulation of Li plating/striping behavior via manipulating the ratio of oxygen containing groups on reduced graphene oxide papers. It has been revealed that the electrochemical properties are highly dependent on the amount of carbonyl C = O groups, which could associate Li+ and serve as a uniform nucleation site to guide Li plating. Furthermore, a high lithium ion diffusion coefficient of similar to 2.09 x 10(-14)m(2) s(-1) was enabled, around one magnitude higher than that of the Li lattice self-diffusivity (similar to 2 x 10(-15)m(2) s(-1)). As a result, stable dendrite-free Li metal anode is realized on the reduced graphene oxide paper with high C] O group content (8.4%), which exhibits a low and stable overpotential of 50 mV for a long lifetime of 400 h. Our studies provide a fresh insight into the Li ion diffusion and its critical role in the regulation of the Li plating/stripping behaviors. (c) 2018 Elsevier Ltd. All rights reserved.

Graphene oxides Li metal anodes Li diffusion Full batteries Li dendrites

SCI ; EI

英语

第一 ; 通讯

peacock technology innovation project[20170328085748757]

Electrochemistry

Electrochemistry

WOS:000451334700048

PERGAMON-ELSEVIER SCIENCE LTD

20184806154175

Anodes ; Diffusion ; Graphene ; Graphene oxide ; Ions ; Lithium-ion batteries ; Plating

Metal Plating:539.3 ; Lithium and Alloys:542.4 ; Electron Tubes:714.1 ; Nanotechnology:761 ; Chemical Products Generally:804

CHEMISTRY

Web of Science

1.Southern Univ Sci & Technol SUSTech, Dept Chem, Shenzhen 518055, Guangdong, Peoples R China
2.Temple Univ, Dept Chem, 1901 North 13th St, Philadelphia, PA 19122 USA
3.Chinese Univ Hong Kong, Dept Mech & Automat Engn, Electrochem Energy & Interfaces Lab, Shatin 999077, Hong Kong, Peoples R China
4.Univ Sci & Technol China, Natl Synchrotron Radiat Lab, Hefei 230029, Anhui, Peoples R China
5.Southern Univ Sci & Technol SUSTech, Acad Adv Interdisciplinary Studies, Shenzhen 518055, Guangdong, Peoples R China

Yu, Yikang,Huang, Wei,Song, Xing,et al. Thermally reduced graphene paper with fast Li ion diffusion for stable Li metal anode[J]. ELECTROCHIMICA ACTA,2019,294:413-422.

Yu, Yikang.,Huang, Wei.,Song, Xing.,Wang, Wenhui.,Hou, Zhen.,...&Quan, Zewei.(2019).Thermally reduced graphene paper with fast Li ion diffusion for stable Li metal anode.ELECTROCHIMICA ACTA,294,413-422.

Yu, Yikang,et al."Thermally reduced graphene paper with fast Li ion diffusion for stable Li metal anode".ELECTROCHIMICA ACTA 294(2019):413-422.