Premium
MXene Enables Stable Solid‐Electrolyte Interphase for Si@MXene Composite with Enhanced Cycling Stability
Author(s) -
Zhou Hao,
Cui Cong,
Cheng Renfei,
Yang Jinxing,
Wang Xiaohui
Publication year - 2021
Publication title -
chemelectrochem
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 1.182
H-Index - 59
ISSN - 2196-0216
DOI - 10.1002/celc.202100878
Subject(s) - electrolyte , materials science , nanoparticle , composite number , interphase , chemical engineering , silicon , coprecipitation , anode , nanotechnology , composite material , electrode , chemistry , optoelectronics , biology , engineering , genetics
Silicon (Si) has been gaining considerable attention in the field of Li‐ion batteries although unstable solid‐electrolyte interphase (SEI), extreme volume changes and inferior conductivity hinder its practical application. Herein, ultrasonic‐assisted electrostatic self‐assembly of fluidic colloidal coprecipitation of MXene wrapped Si nanoparticles (Si@MXene) is proposed. Utilizing the natural negatively charged MXene to capture positive‐charged Si nanoparticles, the homogeneous Ti 3 C 2 T x MXene coating on Si nanoparticles prevents the nanoparticles from directly contacting the electrolyte and thus enables the formation of a stable SEI film on the composite particulates. Due to the elimination of unstable solid‐electrolyte interphase on the surface of Si nanoparticles, Si@MXene delivers high capacity and excellent retention stability of 94 % after 100 cycles. The strategy demonstrated here offers the rational design of MXene‐coated Si anodes with high capacity and superior cycling stability.