Congratulations to Dajin Liu and Jingqi Ma for their joint research paper " Construction of high-performance silicon carbon composite anode materials using Chitin Nanoplates " accepted by Chinese journal of rare materials

Abstract

In order to overcome the dramatic volume expansion of silicon in lithium storage, many studies have been reported on the preparation of silicon carbon composites using advanced carbon materials such as graphene or carbon nanotubes. The high cost and low yield of these carbon materials make them difficult to meet the needs of industrial mass production. In this paper, chitin nanosheets (CNs), polyvinyl alcohol (PVA) and nano-silicon separated by hydrothermal reaction are used as raw materials. Through a simple mixing and drying process, the massive composite CNs-Si-PVA composed of CNs, PVA and nano-silicon is obtained, and the coating of nano-silicon by PVA and CNs is realized. After high temperature pyrolysis, CNS-derived two-dimensional carbon material (2DC) and PvA-derived amorphous carbon co-coated nano-silicon to form silicon carbon composite 2DC-Si-C. Carbon coating can effectively buffer the volume change of silicon anode material during repeated delithium/lithium intercalation process, and improve the electrical conductivity, so that the synthesized 2DC-Si-C can show excellent cycle stability and rate performance when used as the anode material of lithium ion batteries. Due to its green carbon precursor, simple processing method and excellent lithium storage performance, 2DC-Si-C composite is expected to be the anode material for the next generation of high-performance lithium ion batteries.

http://www.rmet-journal.com/WKD3/WebPublication/paperDigest.aspx?paperID=273b755c-2ee6-4077-b4f1-73e78695eb98#