Journal
NANO ENERGY
Volume 84, Issue -, Pages -Publisher
ELSEVIER
DOI: 10.1016/j.nanoen.2021.105891
Keywords
Vacancy engineering; Electronic structure; ZnS tube; Electrocatalyst; Lithium-sulfur battery
Categories
Funding
- Natural Science Foundation of Hebei Province of China [E2020202052]
- Xijiang RD Team
- Guangdong Innovative and Entrepreneurial Team Program [2016ZT06C517]
- Science and Technology Program of Guangzhou [2019050001]
- Science and Technology Program of Zhaoqing [2019K038]
- Natural Sciences and Engineering Research Council of Canada
- University of Waterloo
- Waterloo Institute for Nanotechnology
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By combining architectural and sulfur-vacancy engineering, the interaction between ZnS and active sulfur is improved, facilitating ion/electron transfer, immobilizing lithium polysulfide, and accelerating sulfur reaction kinetics.
Lithium/sulfur (Li/S) battery has been regarded as promising candidate for next-generation energy storage systems due to the high energy density. The big obstacle to realize the practical application of Li/S battery is to synchronously accelerate the redox kinetics and restrain the dissolution of polysulfides into the electrolyte. On this account, ZnS nanotubes with abundant sulfur vacancies (ZnS1-x) are constructed and deposited onto a freestanding carbon cloth electrode for Li/S batteries. The combination of architectural and sulfur-vacancy engineering regulates the electronic structure of ZnS as well as its interactions with active sulfur, thus by facilitates ion/electron transfer, immobilizes lithium polysulfide, and accelerates sulfur reaction kinetics. As a consequence, a capacity of 1043 mAh g-1 is obtained under a low current density of 0.2 C, as well as a capacity retention of 524 mAh g-1 over 500 cycles at 1 C. This work presents a convenient and effective material design strategy to improve the performance of Li/S batteries and promote the practical process.
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