Implanting Transition Metal into Li2O‐Based Cathode Prelithiation Agent for High‐Energy‐Density and Long‐Life Li‐Ion Batteries

Author:

Chen Yilong1,Zhu Yuanlong1,Zuo Wenhua2,Kuai Xiaoxiao13,Yao Junyi4,Zhang Baodan1,Sun Zhefei5,Yin Jianhua1,Wu Xiaohong1,Zhang Haitang1,Yan Yawen1,Huang Huan6,Zheng Lirong6,Xu Juping67,Yin Wen67,Qiu Yongfu8,Zhang Qiaobao5,Hwang Inhui9,Sun Cheng‐Jun9,Amine Khalil2,Xu Gui‐Liang2,Qiao Yu13ORCID,Sun Shi‐Gang1

Affiliation:

1. State Key Laboratory of Physical Chemistry of Solid Surfaces Department of Chemistry College of Chemistry and Chemical Engineering Xiamen University Xiamen 361005 P. R. China

2. Chemical Sciences and Engineering Division Argonne National Laboratory Lemont IL 60439 USA

3. Fujian Science & Technology Innovation Laboratory for Energy Materials of China Tan Kah Kee Innovation Laboratory) Xiamen 361005 P. R. China

4. Department of Chemistr Virginia Tech Blacksburg VA 24061 USA

5. State Key Laboratory of Physical Chemistry of Solid Surfaces College of Materials Xiamen University Xiamen 361005 Fujian China

6. Institute of High Energy Physics Chinese Academy of Sciences Beijing 100049 P. R. China

7. Spallation Neutron Source Science Center Dongguan 523803 China

8. School of Materials Science and Engineering Dongguan University of Technology Guangdong 523808 P. R. China

9. X-ray Sciences Division Argonne National Laboratory Lemont IL 60439 USA

Abstract

AbstractCompensating the irreversible loss of limited active lithium (Li) is essentially important for improving the energy‐density and cycle‐life of practical Li‐ion battery full‐cell, especially after employing high‐capacity but low initial coulombic efficiency anode candidates. Introducing prelithiation agent can provide additional Li source for such compensation. Herein, we precisely implant trace Co (extracted from transition metal oxide) into the Li site of Li2O, obtaining (Li0.66Co0.110.23)2O (CLO) cathode prelithiation agent. The synergistic formation of Li vacancies and Co‐derived catalysis efficiently enhance the inherent conductivity and weaken the Li−O interaction of Li2O, which facilitates its anionic oxidation to peroxo/superoxo species and gaseous O2, achieving 1642.7 mAh/g~Li2O prelithiation capacity (≈980 mAh/g for prelithiation agent). Coupled 6.5 wt % CLO‐based prelithiation agent with LiCoO2 cathode, substantial additional Li source stored within CLO is efficiently released to compensate the Li consumption on the SiO/C anode, achieving 270 Wh/kg pouch‐type full‐cell with 92 % capacity retention after 1000 cycles.

Funder

Fundamental Research Funds for the Central Universities

National Natural Science Foundation of China

Publisher

Wiley

Subject

General Medicine

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