A graphitized expanded graphite cathode for aluminum-ion battery with excellent rate capability

被引:25
作者
Dong, Xiaozhong [1 ,2 ]
Chen, Hao [1 ]
Lai, Haiwen [3 ]
Wang, Liyong [4 ]
Wang, Jiaqing [1 ]
Fang, Wenzhang [1 ]
Gao, Chao [1 ]
机构
[1] Zhejiang Univ, Dept Polymer Sci & Engn, MOE Key Lab Macromol Synth & Functionalizat, Key Lab Adsorpt & Separat Mat & Technol Zhejiang, Hangzhou 310027, Zhejiang, Peoples R China
[2] Taiyuan Inst Technol, Dept Mat Engn, Taiyuan 030008, Shanxi, Peoples R China
[3] Hangzhou Gaoxi Technol Co Ltd, Hangzhou 310000, Zhejiang, Peoples R China
[4] Hebei Normal Univ Nationalities, Chengde 067000, Hebei, Peoples R China
来源
JOURNAL OF ENERGY CHEMISTRY | 2022年 / 66卷
基金
中国国家自然科学基金; 国家重点研发计划;
关键词
Aluminum-ion battery; Expanded graphite; Triethylamine hydrochloride; CARBON; INTERCALATION; FLAKES;
D O I
10.1016/j.jechem.2021.07.016
中图分类号
O69 [应用化学];
学科分类号
081704 ;
摘要
Aluminum-ion battery (AIB) is very promising for its safety and large current charge-discharge. However, it is challenging to build a high-performance AIB system based on low-cost materials especially cathode & electrolyte. Despite the low-cost expanded graphite-triethylaminehydrochloride (EG-ET) system has been improved in cycle performance, its rate capability still remains a gap with the expensive graphene-alkylimidazoliumchloride AIB system. In this work, we treated the cheap EG appropriately through an industrial high-temperature process, employed the obtained EG3K (treated at 3000 degrees C) cathode with AlCl3-ET electrolyte, and built a novel, high-rate capability and double-cheap AIB system. The new EG3K-ET system achieved the cathode capacity of average 110 mAh g(1) at 1 A g(1) with 18,000 cycles, and retained the cathode capacity of 100 mAh g(1) at 5 A g(1) with 27,500 cycles (fast charging of 72 s). Impressively, we demonstrated that a battery pack (EG3K-ET system, 12 mAh) had successfully driven the Model car running 100 m long. In addition, it was confirmed that the improvement of rate capability in the EG3K-ET system was mainly derived by deposition, and its capacity contribution ratio was about 53.7%. This work further promoted the application potential of the low-cost EG-ET AIB system. (C) 2021 Science Press and Dalian Institute of Chemical Physics, Chinese Academy of Sciences. Published by ELSEVIER B.V. and Science Press. All rights reserved.
引用
收藏
页码:38 / 44
页数:7
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