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 |
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Keywords
- Diffusion control
- Magnesium insertion
- NASICON-structure
- Sol-gel method
ASJC Scopus subject areas
- Electrochemistry
- Fuel Technology
- Materials Chemistry
Cite this
Magnesium insertion into Mg0.5+y(FeyTi1-y)2 (PO4)3. / Makino, Koji; Katayama, Yasushi; Miura, Takashi; Kishi, Tomiya.
In: Journal of Power Sources, Vol. 97-98, 07.2001, p. 512-514.Research output: Contribution to journal › Article
}
TY - JOUR
T1 - Magnesium insertion into Mg0.5+y(FeyTi1-y)2 (PO4)3
AU - Makino, Koji
AU - Katayama, Yasushi
AU - Miura, Takashi
AU - Kishi, Tomiya
PY - 2001/7
Y1 - 2001/7
N2 - 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.
AB - 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.
KW - Diffusion control
KW - Magnesium insertion
KW - NASICON-structure
KW - Sol-gel method
UR - http://www.scopus.com/inward/record.url?scp=0035396850&partnerID=8YFLogxK
UR - http://www.scopus.com/inward/citedby.url?scp=0035396850&partnerID=8YFLogxK
U2 - 10.1016/S0378-7753(01)00694-2
DO - 10.1016/S0378-7753(01)00694-2
M3 - Article
VL - 97-98
SP - 512
EP - 514
JO - Journal of Power Sources
JF - Journal of Power Sources
SN - 0378-7753
ER -