Journal
CHEMICAL ENGINEERING JOURNAL
Volume 422, Issue -, Pages -Publisher
ELSEVIER SCIENCE SA
DOI: 10.1016/j.cej.2021.130107
Keywords
Magnetron sputtering; Functional separator; Gradient anchor; Lithium sulfur battery
Categories
Funding
- National Natural Science Foundation of China [51702247, 51521001]
- National Key Research and Development Program of China [2016YFA0202603, 2018YFB0104200, 2020YFA0715000]
- Programme of Introducing Talents of Discipline to Universities [B17034]
- Foshan Xianhu Laboratory of the Advanced Energy Science and Technology Guangdong Laboratory [XHT2020-003]
- Fundamental Research Funds for the Central Universities [2020III029, 2020IVA100, 2021IVA123]
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The use of TiB2 in the separator to anchor polysulfide can effectively reduce the capacity attenuation of lithium-sulfur batteries, achieving more stable and durable cycling performance.
Lithium-sulfur (Li-S) battery has attracted much attention because of its high theoretical capacity, abundant reserve and low toxicity. However, its wide application is limited by the capacity attenuation caused by the shuttle effect. Herein, we report a kind of conductive transition metal compound (TiB2) with gradient distribution in the separator prepared by magnetron sputtering technology to anchor polysulfide, which is verified by DFT calculation. As a result, the battery with TiB2/PP separator had an initial capacity of 1313 mAh g-1 at the current rate of 0.5 C over 100 cycles and even with a capacity attenuation of only 0.026% per cycle at a current density of 2 C over 550 cycles.
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