期刊
ACS NANO
卷 8, 期 3, 页码 3015-3022出版社
AMER CHEMICAL SOC
DOI: 10.1021/nn500327p
关键词
Li-air battery; oxygen electrode; carbon fiber; catalyst; electrochemistry
类别
资金
- AFOSR [FA9550-12-1-0069, FA9550-12-1-0037]
- DOD-Army [W911NF-11-1-0209]
- NSF-AIR [IIP-1343270]
- NSF [CMMI-1266295]
- DAGSI
- NSFC-NSF MWN [NSF-DMR 1106160]
- Direct For Mathematical & Physical Scien
- Division Of Materials Research [1106160] Funding Source: National Science Foundation
- Directorate For Engineering
- Div Of Civil, Mechanical, & Manufact Inn [1266319, 1266295] Funding Source: National Science Foundation
- Directorate For Engineering
- Div Of Industrial Innovation & Partnersh [1343270] Funding Source: National Science Foundation
High energy efficiency and long cycleability are two important performance measures for Li-air batteries. Using a rationally designed oxygen electrode based on a vertically aligned nitrogen-doped coral-like carbon nanofiber (VA-NCCF) array supported by stainless steel cloth, we have developed a nonaqueous Li-O-2 battery with an energy efficiency as high as 90% and a narrow voltage gap of 0.3 V between discharge/charge plateaus. Excellent reversibility and cycleability were also demonstrated for the newly developed oxygen electrode. The observed outstanding performance can be attributed to its unique vertically aligned, coral-like N-doped carbon microstructure with a high catalytic activity and an optimized oxygen/electron transportation capability, coupled with the microporous stainless steel substrate. These results demonstrate that highly efficient and reversible Li-O-2 batteries are feasible by using a rationally designed carbon-based oxygen electrode.
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