期刊
ANGEWANDTE CHEMIE-INTERNATIONAL EDITION
卷 58, 期 47, 页码 17054-17060出版社
WILEY-V C H VERLAG GMBH
DOI: 10.1002/anie.201910202
关键词
carbon nanotubes; oxygen functionalization; sodiophilicity; sodium-air batteries; sodium anodes
资金
- MOST [2016YFA0203302]
- NSFC [21634003, 51573027, 51673043, 21604012, 21805044, 21875042]
- STCSM [16JC1400702, 17QA1400400, 18QA1400700, 18QA1400800]
- Yanchang Petroleum Group
- SHMEC [2017-01-07-00-07-E00062]
Despite efforts to stabilize sodium metal anodes and prevent dendrite formation, achieving long cycle life with high areal capacities remains difficult owing to a combination of complex failure modes that involve retardant uneven sodium nucleation and subsequent dendrite formation. Now, a sodiophilic interphase based on oxygen-functionalized carbon nanotube networks is presented, which concurrently facilitates a homogeneous sodium nucleation and a dendrite-free, lateral growth behavior upon recurring sodium plating/stripping processes. This sodiophilic interphase renders sodium anodes with an ultrahigh capacity of 1078 mA hg(-1) (areal capacity of 10 mAh cm(-2)), approaching the theoretical capacity of 1166 mA hg(-1) of pure sodium, as well as a long cycle life up to 3000 cycles. Implementation of this anode allows for the construction of a sodium-air battery with largely enhanced cycling performance owing to the oxygen functionalization-mediated, dendrite-free sodium morphology.
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