Abstract
A series of transition metal phosphates, Mg0.5+y(FeyTi1-y)2 (PO4)3 (MFTP), modified from Mg0.5Ti2(PO4)3 (MTP) were prepared by sol-gel method and evaluated as cathode materials for rechargeable magnesium cells. The crystal structure of MFTP at 0 ≤ y ≤ 0.5 was identical to that of MTP, while their unit cell volumes were smaller than that of MTP due to introduced Mg2+ ions. Electrochemical magnesium insertion into MFTP was found possible as observed for MTP. However, the limiting extent of magnesium insertion into MFTP at 0.1 ≤ y ≤ 0.5 was small compared with MTP and remarkably dependent on the current density during discharge, suggesting that the insertion limit is determined not by the number of available sites for Mg2+ or electrons but by the mobility of Mg2+ in the host varying with the unit cell volume.
Original language | English |
---|---|
Pages (from-to) | 512-514 |
Number of pages | 3 |
Journal | Journal of Power Sources |
Volume | 97-98 |
DOIs | |
Publication status | Published - 2001 Jul 1 |
Event | 10th International Meeting on Lithium Batteries - Como, Italy Duration: 2001 May 28 → 2001 Jun 2 |
Keywords
- Diffusion control
- Magnesium insertion
- NASICON-structure
- Sol-gel method
ASJC Scopus subject areas
- Renewable Energy, Sustainability and the Environment
- Energy Engineering and Power Technology
- Physical and Theoretical Chemistry
- Electrical and Electronic Engineering