Stable high-capacity and high-rate silicon-based lithium battery anodes upon two-dimensional covalent encapsulation.

ABSTRACT: Silicon is a promising anode material for lithium-ion and post lithium-ion batteries but suffers from a large volume change upon lithiation and delithiation. The resulting instabilities of bulk and interfacial structures severely hamper performance and obstruct practical use. Stability improvements have been achieved, although at the expense of rate capability. Herein, a protocol is developed which we describe as two-dimensional covalent encapsulation. Two-dimensional, covalently bound silicon-carbon hybrids serve as proof-of-concept of a new material design. Their high reversibility, capacity and rate capability furnish a remarkable level of integrated performances when referred to weight, volume and area. Different from existing strategies, the two-dimensional covalent binding creates a

SUBMITTER: Zhang X 

PROVIDER: S-EPMC7395733 | biostudies-literature | 2020 Jul

REPOSITORIES: biostudies-literature