FREN
courbe en fond

Non permanents


Xi Chen

Xi
Chen

  • PhD student

Tél. : 03 22 82 53 38


Descriptif des activités de recherche

New lamellar materials as negative electrodes for Li, Na & K ions batteries.
Silicon is the key anode material for Li-ion and possibly sodium batteries with theoretical capacities of 3590 mAh / g for Li15Si4 and 954 mAh / g for NaSi. Nevertheless, there are well-known locks such as the volume expansion (310% during the insertion of Li) or the low electronic conductivity resulting from limited kinetics and insertion of Na. In this project, which is supervised by Dr. Vincent Seznec (LRCS) and Dr. Laure Monconduit (ICGM Montpellier) we will continue to explore Si or Ge-based two-dimensional structure, the siloxenes/germanenes, thanks to different synthesis methods and try to understand the reaction mechanisms with alkalis such as Li, Na or K. Then, it will be expanded to Sn, Ge and mixte 2D materials where the insertion/deinsertion mechanism will be deeply studied vs Li, Na and K.

Parcours

Master:
Labo: Fujian Normal University (FJNU), College of Environmental Science and Engineering
Supervisor: Qingrong Qian (FJNU); Lingxing Zeng (FJNU)
Year: 2014-2017
Subject: Environmental Chemistry (Direction: Clean Energy Chemistry)
Master thesis: Green synthesis of a Se/HPCF–rGO composite for Li–Se batteries with excellent long-term cycling performance


Compétences

Materials Synthesis, Electrochemical Characterization, Electrode Materials, Batteries, Electrospinning, Porous Carbon, AutoCAD