Surface controlled pseudo-capacitive reactions enabling ultra-fast charging and long-life organic lithium ion batteries

被引:33
作者
Amin, Kamran [1 ,2 ]
Zhang, Jianqi [1 ]
Zhou, Hang-Yu [1 ]
Lu, Ruichiao [1 ]
Miao Zhang [1 ]
Ashraf, Nawal [1 ]
Cheng YueLi [1 ]
Mao, Lijuan [1 ]
Faul, Charl F. J. [3 ]
Wei, Zhixiang [1 ,2 ]
机构
[1] Chinese Acad Sci, Natl Ctr Nanosci & Technol, 11 Zhongguancun North 1st Alley, Beijing 100190, Peoples R China
[2] Univ Chinese Acad Sci, 19 Yuquan Rd, Beijing 100049, Peoples R China
[3] Univ Bristol, Sch Chem, Bristol BS8 1TS, Avon, England
基金
中国国家自然科学基金;
关键词
ELECTRODE MATERIALS; ENERGY-STORAGE; FRAMEWORKS; PERFORMANCE; CATHODE; NANOSHEETS;
D O I
10.1039/d0se00610f
中图分类号
O64 [物理化学(理论化学)、化学物理学];
学科分类号
070304 ; 081704 ;
摘要
To develop ultra-fast charging and long-life lithium ion batteries, a surface-controlled pseudo-capacitive reaction mechanism for high-performance organic lithium ion batteries is developed based on a coaxial nanocomposite of an active anthraquinone-based covalent organic framework (AQ-COF) and carbon nanotubes. AQ-COF was grown on the surface of carbon nanotubes (AQ-COF@CNTs) throughin situpolymerization to improve the conductivity and to facilitate electrochemical properties. AQ-COF grown on CNTs exhibited excellent rate performance and was found to retain 76% of its initial capacity at a current density of 5000 mA g(-1)(33C), and even retained 48% at an ultra-high current density of 10 000 mA g(-1)(66.7C). Furthermore, under long term cycling performance investigations, the AQ-COF@CNT based cathode retained 100% of its initial capacity even after 3000 charge-discharge cycles. We further evaluated the charge storage mechanism and found that pseudocapacitance arising from surface-controlled redox reactions, coupled with excellent charge-transfer properties owing to the conductive CNT network and facilitated by the large surface area of active material, is mainly responsible for this excellent rate and cycling performance.
引用
收藏
页码:4179 / 4185
页数:7
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