Preparation and electrochemical magnesium insertion behaviors of Mg0.5+y(MeyTi1-y)2(PO4) 3 (Me = Cr, Fe)

Koji Makino; Yasushi Katayama; Takashi Miura; Tomiya Kishi

doi:10.1016/S0378-7753(02)00345-2

Preparation and electrochemical magnesium insertion behaviors of Mg_0.5+y(Me_yTi_1-y)₂(PO₄) ₃ (Me = Cr, Fe)

Koji Makino, Yasushi Katayama, Takashi Miura, Tomiya Kishi

Department of Applied Chemistry

Research output: Contribution to journal › Article › peer-review

31 Citations (Scopus)

Abstract

A series of transition metal phosphates, Mg_0.5+y(Fe_yTi_1-y)₂(PO₄) ₃ (MFTP) and Mg_0.5+y(Cr_yTi_1-y)₂(PO₄) ₃ (MCTP), modified from Mg_0.5Ti₂(PO₄)₃ (MTP) were prepared by sol-gel method and evaluated as a possible cathode material for magnesium cells. The lattice structures of MFTP and MCTP at 0 ≤ y ≤ 0.5 were identical with that of MTP, while their unit cell volumes were smaller than that of MTP due to the increased amount of Mg²⁺ ions. Electrochemical magnesium insertion into MFTP and MCTP was found to be 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 discharge current density during discharge. These facts suggested that the insertion limit is determined not by the number of available sites for Mg²⁺ or electrons but by the mobility of Mg²⁺ in these host materials correlating with decrease in the unit cell volume.

Original language	English
Pages (from-to)	85-89
Number of pages	5
Journal	Journal of Power Sources
Volume	112
Issue number	1
DOIs	https://doi.org/10.1016/S0378-7753(02)00345-2
Publication status	Published - 2002 Oct 24

Keywords

Electrochemical magnesium insertion
Magnesium battery
Magnesium titanium phosphate

ASJC Scopus subject areas

Renewable Energy, Sustainability and the Environment
Energy Engineering and Power Technology
Physical and Theoretical Chemistry
Electrical and Electronic Engineering

UN SDGs

This output contributes to the following UN Sustainable Development Goals (SDGs)

Access to Document

10.1016/S0378-7753(02)00345-2

Cite this

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title = "Preparation and electrochemical magnesium insertion behaviors of Mg0.5+y(MeyTi1-y)2(PO4) 3 (Me = Cr, Fe)",

abstract = "A series of transition metal phosphates, Mg0.5+y(FeyTi1-y)2(PO4) 3 (MFTP) and Mg0.5+y(CryTi1-y)2(PO4) 3 (MCTP), modified from Mg0.5Ti2(PO4)3 (MTP) were prepared by sol-gel method and evaluated as a possible cathode material for magnesium cells. The lattice structures of MFTP and MCTP at 0 ≤ y ≤ 0.5 were identical with that of MTP, while their unit cell volumes were smaller than that of MTP due to the increased amount of Mg2+ ions. Electrochemical magnesium insertion into MFTP and MCTP was found to be 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 discharge current density during discharge. These facts suggested that the insertion limit is determined not by the number of available sites for Mg2+ or electrons but by the mobility of Mg2+ in these host materials correlating with decrease in the unit cell volume.",

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T1 - Preparation and electrochemical magnesium insertion behaviors of Mg0.5+y(MeyTi1-y)2(PO4) 3 (Me = Cr, Fe)

AU - Makino, Koji

AU - Katayama, Yasushi

AU - Miura, Takashi

AU - Kishi, Tomiya

PY - 2002/10/24

Y1 - 2002/10/24

N2 - A series of transition metal phosphates, Mg0.5+y(FeyTi1-y)2(PO4) 3 (MFTP) and Mg0.5+y(CryTi1-y)2(PO4) 3 (MCTP), modified from Mg0.5Ti2(PO4)3 (MTP) were prepared by sol-gel method and evaluated as a possible cathode material for magnesium cells. The lattice structures of MFTP and MCTP at 0 ≤ y ≤ 0.5 were identical with that of MTP, while their unit cell volumes were smaller than that of MTP due to the increased amount of Mg2+ ions. Electrochemical magnesium insertion into MFTP and MCTP was found to be 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 discharge current density during discharge. These facts suggested that the insertion limit is determined not by the number of available sites for Mg2+ or electrons but by the mobility of Mg2+ in these host materials correlating with decrease in the unit cell volume.

AB - A series of transition metal phosphates, Mg0.5+y(FeyTi1-y)2(PO4) 3 (MFTP) and Mg0.5+y(CryTi1-y)2(PO4) 3 (MCTP), modified from Mg0.5Ti2(PO4)3 (MTP) were prepared by sol-gel method and evaluated as a possible cathode material for magnesium cells. The lattice structures of MFTP and MCTP at 0 ≤ y ≤ 0.5 were identical with that of MTP, while their unit cell volumes were smaller than that of MTP due to the increased amount of Mg2+ ions. Electrochemical magnesium insertion into MFTP and MCTP was found to be 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 discharge current density during discharge. These facts suggested that the insertion limit is determined not by the number of available sites for Mg2+ or electrons but by the mobility of Mg2+ in these host materials correlating with decrease in the unit cell volume.

KW - Electrochemical magnesium insertion

KW - Magnesium battery

KW - Magnesium titanium phosphate

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