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- Title
Diminishing Self‐Discharge of High‐Loading Li−S Batteries with Oxygen‐Rich Biomass Carbon Interlayers.
- Authors
Li, Wei; Qin, Yumei; Dou, Xiaojian; Hu, Qiong; Liang, Wenyu; Nie, Guochao; Zhu, Gaolong; Zeng, Chujie; Zeng, Guangfeng
- Abstract
Lithium‐sulfur batteries (Li−S) have possessed gratifying development in the past decade due to their high theoretical energy density. However, the severe polysulfide shuttling provokes undesirable self‐discharge effect, leading to low energy efficiency in Li−S batteries. Herein, an interlayer composed of oxygen‐rich carbon nanosheets (OCN) derived from bagasse is elaborated to suppress the shuttle effect and reduce the resultant self‐discharge effect. The OCN interlayer is able to physically block the shuttling behavior of polysulfides and its oxygen‐rich functional groups can strongly interact with polysulfides via O−S bonds to chemically immobilize mobile polysulfides. The self‐discharge test for seven days further shows that the self‐discahrge rate is diminished by impressive 93 %. As a result, Li−S batteries with the OCN interlayer achieve an ultrahigh discharge specific capacity of 710 mAh g−1 at a high mass loading of 7.18 mg. The work provides a facile method for designing functional interlayers and opens a new avenue for realizing Li−S batteries with high energy efficiency.
- Subjects
LITHIUM sulfur batteries; ENERGY consumption; BIOMASS; POLYSULFIDES; ENERGY density; CARBON
- Publication
Chemistry - An Asian Journal, 2024, Vol 19, Issue 12, p1
- ISSN
1861-4728
- Publication type
Article
- DOI
10.1002/asia.202400177