Journal ArticleDOI
Defect Engineering toward Atomic Co–Nx–C in Hierarchical Graphene for Rechargeable Flexible Solid Zn-Air Batteries
TLDR
This work demonstrates the direct utilization of the intrinsic structural defects in nanocarbon to generate atomically dispersed Co-Nx -C active sites via defect engineering and provides a new concept and effective methodology for the full utilization ofnanocarbon materials with various structural features and further development of advanced energy materials.Abstract:
Rechargeable flexible solid Zn-air battery, with a high theoretical energy density of 1086 Wh kg−1, is among the most attractive energy technologies for future flexible and wearable electronics; nevertheless, the practical application is greatly hindered by the sluggish oxygen reduction reaction/oxygen evolution reaction (ORR/OER) kinetics on the air electrode. Precious metal-free functionalized carbon materials are widely demonstrated as the most promising candidates, while it still lacks effective synthetic methodology to controllably synthesize carbocatalysts with targeted active sites. This work demonstrates the direct utilization of the intrinsic structural defects in nanocarbon to generate atomically dispersed Co–Nx–C active sites via defect engineering. As-fabricated Co/N/O tri-doped graphene catalysts with highly active sites and hierarchical porous scaffolds exhibit superior ORR/OER bifunctional activities and impressive applications in rechargeable Zn-air batteries. Specifically, when integrated into a rechargeable and flexible solid Zn-air battery, a high open-circuit voltage of 1.44 V, a stable discharge voltage of 1.19 V, and a high energy efficiency of 63% at 1.0 mA cm−2 are achieved even under bending. The defect engineering strategy provides a new concept and effective methodology for the full utilization of nanocarbon materials with various structural features and further development of advanced energy materials.read more
Citations
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Journal ArticleDOI
Advanced Carbon for Flexible and Wearable Electronics.
TL;DR: The latest advances in the rational design and controlled fabrication of carbon materials toward applications in flexible and wearable electronics are reviewed and various carbon materials with controlled micro/nanostructures and designed macroscopic morphologies for high-performance flexible electronics are introduced.
Journal ArticleDOI
From 3D ZIF Nanocrystals to Co-N x /C Nanorod Array Electrocatalysts for ORR, OER, and Zn-Air Batteries
Ibrahim Saana Amiinu,Xiaobo Liu,Zonghua Pu,Wenqiang Li,Qidong Li,Jie Zhang,Haolin Tang,Haining Zhang,Shichun Mu +8 more
TL;DR: In this article, an advanced Co-Nx/C nanorod array derived from 3D ZIF nanocrystals with superior electrocatalytic activity and stability toward oxygen reduction reaction (ORR) and oxygen evolution reaction (OER) compared to commercial Pt/C and IrO2, respectively, is synthesized.
Journal ArticleDOI
A Review of Precious-Metal-Free Bifunctional Oxygen Electrocatalysts: Rational Design and Applications in Zn−Air Batteries
Journal ArticleDOI
Defect Engineering on Electrode Materials for Rechargeable Batteries.
Yiqiong Zhang,Yiqiong Zhang,Li Tao,Chao Xie,Dongdong Wang,Yuqin Zou,Ru Chen,Yanyong Wang,Chuankun Jia,Shuangyin Wang +9 more
TL;DR: Recent advances regarding defect engineering in electrode materials for rechargeable batteries are systematically summarized, with a special focus on the application of metal-ion batteries, lithium-sulfur batteries, and metal-air batteries.
Journal ArticleDOI
Dendrites in Zn-Based Batteries.
Qi Yang,Qing Li,Zhuoxin Liu,Donghong Wang,Ying Guo,Xinliang Li,Yongchao Tang,Hongfei Li,Binbin Dong,Chunyi Zhi +9 more
TL;DR: This dendrite issue in Zn anodes, with regard to fundamentals, protection strategies, characterization techniques, and theoretical simulations, is systematically discussed and comprehensively summarized to generate an overview of respective superiorities and limitations of various strategies.
References
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Efficient Bifunctional Fe/C/N Electrocatalysts for Oxygen Reduction and Evolution Reaction
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Journal ArticleDOI
High-Performance Oxygen Reduction Electrocatalyst Derived from Polydopamine and Cobalt Supported on Carbon Nanotubes for Metal–Air Batteries
TL;DR: In this article, a core-shell hybrid electrocatalyst is developed via self-polymerization of dopamine and cobalt on carbon nanotubes (CNTs), followed by high-temperature pyrolysis.