Atomic Ni and Cu co-anchored 3D nanoporous graphene as an efficient oxygen reduction electrocatalyst for zinc-air batteries

Yongtai Cheng, Haofei Wu, Jiuhui Han, Siying Zhong, Senhe Huang, Shufen Chu, Shuangxi Song, Kolan Madhav Reddy, Xiaodong Wang, Shaoyi Wu, Xiaodong Zhuang, Isaac Johnson, Pan Liu, Mingwei Chen

研究成果: Article査読

11 被引用数 (Scopus)

抄録

Highly active, cost-effective and durable electrocatalysts for the oxygen reduction reaction (ORR) are critically important for renewable energy conversion and storage. Here we report a 3D bicontinuous nitrogen doped nanoporous graphene electrocatalyst co-anchoring with atomically dispersed nickel and copper atoms ((Ni,Cu)-NG) as a highly active single-atom ORR catalyst, fabricated by the combination of chemical vapor deposition and high temperature gas transportation. The resultant (Ni,Cu)-NG exhibits an exceptional ORR activity in alkaline electrolytes, comparable to the Pt-based benchmarks, from the synergistic effect of the CuNx and NiNx complexes. Endowed with high catalytic activity and outstanding durability under harsh electrochemical environments, rechargeable zinc-air batteries using (Ni,Cu)-NG as the cathodes show excellent energy efficiency (voltage gap of 0.74 V), large power density (150.6 mW cm-2 at 250 mA cm-2) and high cycling stability (>500 discharge-charge cycles at 10 mA cm-2). This study may pave an efficient avenue for designing highly durable single-atom ORR catalysts for metal-air batteries.

本文言語English
ページ(範囲)10862-10870
ページ数9
ジャーナルNanoscale
13
24
DOI
出版ステータスPublished - 2021 6月 28

ASJC Scopus subject areas

  • 材料科学(全般)

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