Issue

Vol. 13 (2021)

Identifying Heteroatomic and Defective Sites in Carbon with Dual-Ion Adsorption Capability for High Energy and Power Zinc Ion Capacitor

https://doi.org/10.1007/s40820-021-00588-5
Wenjie Fan
Key Laboratory of Advanced Ceramics and Machining Technology (Ministry of Education), School of Materials Science and Engineering, Tianjin University, Tianjin 300072, People’s Republic of China
Jia Ding
Key Laboratory of Advanced Ceramics and Machining Technology (Ministry of Education), School of Materials Science and Engineering, Tianjin University, Tianjin 300072, People’s Republic of China
Jingnan Ding
Key Laboratory of Advanced Ceramics and Machining Technology (Ministry of Education), School of Materials Science and Engineering, Tianjin University, Tianjin 300072, People’s Republic of China
Yulong Zheng
School of Materials Science and Engineering, Ocean University of China, Qingdao 266100, People’s Republic of China
Wanqing Song
Key Laboratory of Advanced Ceramics and Machining Technology (Ministry of Education), School of Materials Science and Engineering, Tianjin University, Tianjin 300072, People’s Republic of China
Jiangfeng Lin
Key Laboratory of Advanced Ceramics and Machining Technology (Ministry of Education), School of Materials Science and Engineering, Tianjin University, Tianjin 300072, People’s Republic of China
Caixia Xiao
Key Laboratory of Advanced Ceramics and Machining Technology (Ministry of Education), School of Materials Science and Engineering, Tianjin University, Tianjin 300072, People’s Republic of China
Cheng Zhong
Key Laboratory of Advanced Ceramics and Machining Technology (Ministry of Education), School of Materials Science and Engineering, Tianjin University, Tianjin 300072, People’s Republic of China
Huanlei Wang
School of Materials Science and Engineering, Ocean University of China, Qingdao 266100, People’s Republic of China
Wenbin Hu
Key Laboratory of Advanced Ceramics and Machining Technology (Ministry of Education), School of Materials Science and Engineering, Tianjin University, Tianjin 300072, People’s Republic of China

Corresponding Author: Wenbin Hu

wbhu@tju.edu.cn

Nano-Micro Letters, Vol. 13 (2021), Article Number: 59

Abstract

Aqueous zinc-based batteries (AZBs) attract tremendous 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 construct an aqueous zinc ion capacitor possessing an unrivaled combination 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 routine 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 characterization 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.


Highlights:


1 A unique dual-ion adsorption mechanism for zinc ion capacitor is enabled by a carbon cathode with defect-rich tissue, dense heteroatom dopant and immense surface area.
2 The active sites on carbon surface for reversible dual-ion adsorption are identified by in-depth characterizations and DFT simulations.
3 The zinc ion capacitor delivers unrivaled combination of high energy and power characteristics. The superb energy, power and cyclability are achieved in multiple cell configurations including coin cell and flexible solid-state pouch-/cable-type cells.

Keywords

Aqueous zinc ion capacitor Dual-ion adsorption Charge storage mechanism High energy and power Flexible and knittable devices
Fan, Wenjie, Jia Ding, Jingnan Ding, Yulong Zheng, Wanqing Song, Jiangfeng Lin, Caixia Xiao, Cheng Zhong, Huanlei Wang, and Wenbin Hu. 2021. “Identifying Heteroatomic and Defective Sites in Carbon With Dual-Ion Adsorption Capability for High Energy and Power Zinc Ion Capacitor”. Nano-Micro Letters 13 (January):59. https://doi.org/10.1007/s40820-021-00588-5.
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