Journal
ENERGY STORAGE MATERIALS
Volume 17, Issue -, Pages 118-125Publisher
ELSEVIER
DOI: 10.1016/j.ensm.2018.11.020
Keywords
Lithium-sulfur batteries; Li2S8; carbon coated TiO2 nanowire; industrial applications
Funding
- Priority Academic Program Development of Jiangsu Higher Education Institutions (PAPD)
- Innovation Scientists and Technicians Team Construction Projects of Henan Province [CXTD2017002]
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The development of high performance lithium-sulfur batteries is trapped by the shuttle effect of intermediate polysulfides and the insulating nature of sulfur. To overcome these drawbacks, numerous state-of-the-art encapsulation/wrap of sulfur strategies have been developed. However, most of these methods have challenges to implement in commercializing applications of lithium-sulfur batteries. Herein, a facile and effective sulfur loading method is presented by droping liquid Li2S8 into carbon coated TiO2 nanowire arrays without any complex pre-processing. As a result, these electrodes with 2.0 and 4.0 mg/cm(2) sulfur have high initial capacities of 1280 and 1240 mAh/g, and maintain 930 and 680 mAh/g after 500 cycles under 3.2 mA, respectively. For a quick-acting cycling, it holds 520 mAh/g after 500 cycles at 5.8 mA with 4.0 mg/cm(2) sulfur loading. The facile sulfur loading approach may provide a new opportunity to construct high performance sulfur-based cathodes for their industrial applications.
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