Localized Electrons Enhanced Ion Transport for Ultrafast Electrochemical Energy Storage.
basic_science · Level V
Where this comes from
- Record sourced from PubMed, PMID 32101356.
- Also identified by DOI 10.1002/adma.201905578.
- No licence information is recorded for this record.
- Because redistribution is not established, this page shows the abstract only. Follow the links below for the full text.
Abstract
The rate-determining process for electrochemical energy storage is largely determined by ion transport occurring in the electrode materials. Apart from decreasing the distance of ion diffusion, the enhancement of ionic mobility is crucial for ion transport. Here, a localized electron enhanced ion transport mechanism to promote ion mobility for ultrafast energy storage is proposed. Theoretical calculations and analysis reveal that highly localized electrons can be induced by intrinsic defects, and the migration barrier of ions can be obviously reduced. Consistently, experiment results reveal that this mechanism leads to an enhancement of Li/Na ion diffusivity by two orders of magnitude. At high mass loading of 10 mg cm<sup>-2</sup> and high rate of 10C, a reversible energy storage capacity up to 190 mAh g<sup>-1</sup> is achieved, which is ten times greater than achievable by commercial crystals with comparable dimensions.