期刊
ACS NANO
卷 14, 期 3, 页码 3490-3499出版社
AMER CHEMICAL SOC
DOI: 10.1021/acsnano.9b09646
关键词
Li-O-2 batteries; cathode catalysts; heterostructure engineering; electron transfer; intermediate solubility
类别
资金
- National Natural Science Foundation of China [21603157, 51722204, 51972041, 51972042]
- Ministry of Science and Technology of the People's Republic of China [2015CB358600]
- Department of Science and Technology of Sichuan Province [2016RZ0033, 2018RZ0082]
- Ministry of Education of the People's Republic of China [ZYGX2016Z004, ZYGX2018J036]
- Frontier Science project of Dongguan [2019622101004]
The aprotic lithium-oxygen (Li-O-2) battery has triggered tremendous efforts for advanced energy storage due to the high energy density. However, realizing toroid-like Li2O2 deposition in low-donor-number (DN) solvents is still the intractable obstruction. Herein, a heterostructured NiS2/ZnIn2S4 is elaborately developed and investigated as a promising catalyst to regulate the Li2O2 deposition in low-DN solvents. The as-developed NiS2/ZnIn2S4 promotes interfacial electron transfer, regulates the adsorption energy of the reaction intermediates, and accelerates O-O bond cleavage, which are convincingly evidenced experimentally and theoretically. As a result, the toroidlike Li2O2 product is achieved in a Li-O-2 battery with low-DN solvents via the solvation-mediated pathway, which demonstrates superb cyclability over 490 cycles and a high output capacity of 3682 mA h g(-1). The interface engineering of heterostructure catalysts offers more possibilities for the realization of toroid-like Li2O2 in low-DN solvents, holding great promise in achieving practical applications of Li-O-2 batteries as well as enlightening the material design in catalytic systems.
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