Journal
SCIENCE CHINA-MATERIALS
Volume 66, Issue 1, Pages 51-60Publisher
SCIENCE PRESS
DOI: 10.1007/s40843-022-2142-1
Keywords
lithium-ion batteries; SiOx-based anode materials; N-doped Ti3C2Tx MXene nanosheets; ball milling exfoliation; adsorption energy
Categories
Ask authors/readers for more resources
Researchers have successfully developed N-doped Ti3C2Tx MXene ultrathin sheet (NTS)-coupled SiOx nanoparticles using a melamine-assisted ball milling and annealing procedure. The composite material exhibits fast reaction kinetics, high stability, long lifespan, and good cycling stability at high mass loadings, showing promising application prospects.
Constructing SiOx-based composite materials with fast reaction kinetics and high stability is crucial but challenging for high-performance lithium-ion batteries. Herein, we developed the N-doped Ti3C2Tx MXene ultrathin sheet (NTS)-coupled SiOx nanoparticles using a melamine-assisted ball milling and annealing procedure. The principle of melamine in exfoliating MXene was demonstrated by contrast experiments and theoretical calculations. The strong interfacial interactions between SiOx and the NTS (Si-O-Ti bond) can effectively enhance the electron transfer and ensure electrode stability. Moreover, the NTS with rich surface groups endowed the composite with a pseudocapacitive behavior, beneficial for fast lithium storage. As a result, the composite delivered a long lifespan (similar to 700 mA h g(-1) over 800 cycles at 1.0 A g(-1)) and a superior rate performance (596.4 mA h g(-1) at 5 A g(-1)). More importantly, the composite in half and full cells exhibited high areal capacity and good cycling stability at high mass loadings, revealing a promising application prospect.
Authors
I am an author on this paper
Click your name to claim this paper and add it to your profile.
Reviews
Recommended
No Data Available