About this Abstract |
Meeting |
MS&T24: Materials Science & Technology
|
Symposium
|
Manufacturing and Processing of Advanced Ceramic Materials
|
Presentation Title |
Lithium Storage Performance of Anti-Site Defects Influenced Nanostructured LiFePO4 for High-Power Applications |
Author(s) |
Markas Law, Hwang Sheng Lee, Viswanathan Ramar , Palani Balaya |
On-Site Speaker (Planned) |
Palani Balaya |
Abstract Scope |
In this talk, we report our recent work on olivine LiFePO4 with intrinsically low electronic and ionic conductivities, which affect storage performance with sluggish kinetic properties that result in huge polarisation specifically at high current rates. To overcome such kinetic issues, we present here a facile soft template-solvothemal method for synthesizing mesoporous LiFePO4, which is made of well interconnected nanograins (20-30 nm). In comparison with the LiFePO4 synthesized by the soft template or solvothermal method, reported mesoporous LiFePO4 demonstrates improved storage performance at high rates with significantly less polarisation and clear signature of voltage plateaus for both Li ion insertion/extraction processes. This is attributed to the 2-D diffusion of both Li ions and electrons along b- and c-axes consistent with the 2-D Li ions transport reported previously for LiFePO4 single crystal. |