Abstract
Oxygen vacancies are usually considered to be beneficial in catalytic conversion of polysulfides in lithium–sulfur batteries. Now it is demonstrated that the conversion of polysulfides was hindered by oxygen vacancies on ultrathin niobic acid. The inferior performance induced by the oxygen vacancy was mainly attributed to the decreased electric conductivity as well as the weakened adsorption of polysulfides on the catalyst surface. This work shows that the care should be taken when designing a new catalyst for the lithium–sulfur battery using a defect-engineering strategy. © 2019 Wiley-VCH Verlag GmbH & Co. KGaA, Weinheim
| Original language | English |
|---|---|
| Pages (from-to) | 11491-11496 |
| Journal | Angewandte Chemie - International Edition |
| Volume | 58 |
| Issue number | 33 |
| Online published | 5 Aug 2019 |
| DOIs | |
| Publication status | Published - 12 Aug 2019 |
| Externally published | Yes |
Funding
Research reported in this publication was supported by the China National Funds for Excellent Young Scientists (grant no. 21522106), the National Key R&D Program of China (2017YFA0208000), 111 Project (B18030) from China, and the National Nature Science Foundation of China (21771156) and the Early Career Scheme (ECS) fund (Grant No.: PolyU 253026/16P) from the Research Grant Council (RGC) of Hong Kong. We thank Prof. Guanghao Lu for his kind help and the Instrument Analysis Center of Xi'an Jiaotong University for assistance on characterizations.
Research Keywords
- catalytic conversion
- electrochemistry
- Li-S batteries
- niobic acid
- oxygen vacancies
RGC Funding Information
- RGC-funded
