Journal ArticleDOI
Defect Engineering toward Atomic Co–Nx–C in Hierarchical Graphene for Rechargeable Flexible Solid Zn-Air Batteries
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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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Edge-Selectively Sulfurized Graphene Nanoplatelets as Efficient Metal-Free Electrocatalysts for Oxygen Reduction Reaction
TL;DR: The resultant edge-selectively sulfurized graphene nanoplatelets exhibit remarkable electrocatalytic activity toward ORR with better tolerance to methanol crossover/CO poisoning effects and longer-term stability than those of pristine graphite and commercial Pt/C Electrocatalysts.
Journal ArticleDOI
NiO/CoN Porous Nanowires as Efficient Bifunctional Catalysts for Zn–Air Batteries
Jie Yin,Yuxuan Li,Fan Lv,Qiaohui Fan,Yong-Qing Zhao,Qiaolan Zhang,Wei Wang,Fangyi Cheng,Pinxian Xi,Shaojun Guo +9 more
TL;DR: P porous NiO/CoN interface nanowire arrays (PINWs) with both oxygen vacancies and a strongly interconnected nanointerface between NiO and CoN domains for promoting the electrocatalytic performance and stability for OER and ORR are reported.
Journal ArticleDOI
Nitrogen-Doped Co3O4 Mesoporous Nanowire Arrays as an Additive-Free Air-Cathode for Flexible Solid-State Zinc–Air Batteries
Minghao Yu,Zhengke Wang,Cheng Hou,Zilong Wang,Chaolun Liang,Cunyuan Zhao,Yexiang Tong,Xihong Lu,Shihe Yang +8 more
TL;DR: A controllable N-doping strategy to significantly improve the catalytic activity of Co3 O4 for ORR is reported and these N doped Co 3 O4 nanowires are demonstrated as an additive-free air-cathode for flexible solid-state zinc-air batteries.
Journal ArticleDOI
Recent progress and perspectives on bi-functional oxygen electrocatalysts for advanced rechargeable metal–air batteries
TL;DR: In this article, a review of recent developments in bi-functional catalysts and their catalytic activity in relation to materials composition, morphology, and crystal structure obtained through various synthetic techniques is presented.
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Fe–N-Doped Carbon Capsules with Outstanding Electrochemical Performance and Stability for the Oxygen Reduction Reaction in Both Acid and Alkaline Conditions
Guillermo A. Ferrero,Kathrin Preuss,Adam Marinovic,Ana Belen Jorge,Noramalina Mansor,Dan J. L. Brett,Antonio B. Fuertes,Marta Sevilla,Maria-Magdalena Titirici +8 more
TL;DR: An alkaline anion exchange membrane fuel cell was assembled with Fe-N-doped mesoporous carbon capsules as the cathode catalyst to provide current and power densities matching those of a commercial Pt/C, which indicates the practical applicability of the Fe-n-carbon catalyst.