High-quality mesoporous graphene particles as high-energy and fast-charging anodes for lithium-ion batteries.
basic_science · Level V
Where this comes from
- Record sourced from PubMed, PMID 30931924.
- Also identified by DOI 10.1038/s41467-019-09274-y and PMC identifier 6443805.
- Licence recorded as CC BY.
- The licence permits redistribution, so the abstract is shown in full and the full text is available from the publisher.
Abstract
The application of graphene for electrochemical energy storage has received tremendous attention; however, challenges remain in synthesis and other aspects. Here we report the synthesis of high-quality, nitrogen-doped, mesoporous graphene particles through chemical vapor deposition with magnesium-oxide particles as the catalyst and template. Such particles possess excellent structural and electrochemical stability, electronic and ionic conductivity, enabling their use as high-performance anodes with high reversible capacity, outstanding rate performance (e.g., 1,138 mA h g<sup>-1</sup> at 0.2 C or 440 mA h g<sup>-1</sup> at 60 C with a mass loading of 1 mg cm<sup>-2</sup>), and excellent cycling stability (e.g., >99% capacity retention for 500 cycles at 2 C with a mass loading of 1 mg cm<sup>-2</sup>). Interestingly, thick electrodes could be fabricated with high areal capacity and current density (e.g., 6.1 mA h cm<sup>-2</sup> at 0.9 mA cm<sup>-2</sup>), providing an intriguing class of materials for lithium-ion batteries with high energy and power performance.