Research Fellow  2012-2015

CONTACT

EDUCATION

Ph.D., Depart. of Chemical & Biomolecular Engineering, NUS, 2012
M. Sc., college of science, Harbin Institute of Technology, 2008

B. Sc., college of science, Harbin Institute of Technology, 2006
 

RESEARCH INTEREST

One of the greatest challenges in applying a high capacity anode material is to overcome the initial irreversible capacity loss (ICL) problem. A large ICL is not acceptable in practice because it consumes a large amount of lithium ions from the more expensive cathode materials, leading to the increased usage of the latter. The main objective is to alleviate the ICL of high capacity lithium ion battery anode materials. Tin-based anode materials; which have a high Li⁺ storage capacity (Sn: 992 mAh/g with stoichiometry of Li_4.4Sn) and are relatively easy to synthesize by environmentally friendly methods from low cost resources; are the target anode material. The principal strategy to mitigate the large ICL of tin-based particles is to form an effective protective layer on them. The protective layer should minimize the direct contact between tin-based particles and the electrolyte which is the cause for the large ICL. On the other hand the coated composite anode materials should retain the high capacity and cyclability of the protected core materials.

Fig 1. Illustrative relationship between the specific capacity of the full cell and the specific capacity of anode.

Fig 2. Schematic illustration of hollow tin oxide nanoparticles with and without protective layer.