纳微快报（英文）2021，Vol.13Issue(4)：58-75,18.
Identifying Heteroatomic and Defective Sites in Carbon with Dual-Ion Adsorption Capability for High Energy and Power Zinc Ion Capacitor
Identifying Heteroatomic and Defective Sites in Carbon with Dual?Ion Adsorption Capability for High Energy and Power Zinc Ion Capacitor
摘要
Abstract
Aqueous zinc-based batteries (AZBs) attract tremen-dous attention due to the abundant and rechargeable zinc anode. Nonetheless, the requirement of high energy and power densities raises great challenge for the cathode development. Herein we con-struct an aqueous zinc ion capacitor possessing an unrivaled com-bination of high energy and power characteristics by employing a unique dual-ion adsorption mechanism in the cathode side. Through a templating/activating co-assisted carbonization procedure, a rou-tine protein-rich biomass transforms into defect-rich carbon with immense surface area of 3657.5 m2 g?1 and electrochemically active heteroatom content of 8.0 at％. Comprehensive characteriza-tion and DFT calculations reveal that the obtained carbon cathode exhibits capacitive charge adsorptions toward both the cations and anions, which regularly occur at the specific sites of heteroatom moieties and lattice defects upon different depths of discharge/charge. The dual-ion adsorption mechanism endows the assembled cells with maximum capacity of 257 mAh g?1 and retention of 72 mAh g?1 at ultrahigh current density of 100 A g?1 (400 C), corresponding to the outstanding energy and power of 168 Wh kg?1 and 61,700 W kg?1. Furthermore, practical battery configurations of solid-state pouch and cable-type cells display excellent reliability in electrochemistry as flexible and knittable power sources.关键词
Aqueous zinc ion capacitor/Dual-ion adsorption/Charge storage mechanism/High energy and power/Flexible and knittable devicesKey words
Aqueous zinc ion capacitor/Dual-ion adsorption/Charge storage mechanism/High energy and power/Flexible and knittable devices引用本文复制引用
Wenjie Fan,Wenbin Hu,Jia Ding,Jingnan Ding,Yulong Zheng,Wanqing Song,Jiangfeng Lin,Caixia Xiao,Cheng Zhong,Huanlei Wang..Identifying Heteroatomic and Defective Sites in Carbon with Dual-Ion Adsorption Capability for High Energy and Power Zinc Ion Capacitor[J].纳微快报（英文）,2021,13(4):58-75,18.基金项目
J. D. greatly acknowledges the support from the National Natural Science Foundation of China (No. 52072257) and the financial support from the National Key Research and Development Program of China (No.: 2019YFE0118800). W. H. greatly acknowledges the support from the National Natu-ral Science Foundation of China and Guangdong Province (No. U1601216). H. W. greatly acknowledges the support from the Shandong Provincial Key R&D Plan and the Public Welfare Spe-cial Program, China (2019GGX102038), and the Fundamental Research Funds for the Central Universities (No. 201822008 and 201941010). （No. 52072257）
