Abstract
The electrochemical intercalation of lithium into chromium (V)-containing oxides isostructural with β- and γ-Li3PO4 has been studied. β-Li3CrO4 can reversibly intercalate around 1 mole of Li ions per formula unit to give Li3 + xCrO4: 0 < x < 1 with a discharge capacity of 196 mAh g-1; electrochemical data indicate the possible existence of a two-phase region in the approximate range 0.3 < x < 0.8. Fully intercalated material appears to have a γ-related structure. γ-Li3.5Cr0.5Ge0.5O4, with a LISICON structure can reversibly intercalate up to 0.5 moles of Li ions per formula unit to give Li3.5 + xCr0.5Ge0.5O4: 0 < x < 0.5. During intercalation, the γ-phase transforms into a β-phase which is retained on deintercalation. The volume changes associated with (de) intercalation of both β and γ structures are small, ≪ 1%. During the β → γ transition, the orthorhombic c axis, and the unit cell volume, increase by ~ 2%.
| Original language | English |
|---|---|
| Pages (from-to) | 309-314 |
| Number of pages | 6 |
| Journal | Solid State Ionics |
| Volume | 76 |
| Issue number | 3-4 |
| DOIs | |
| Publication status | Published - Mar 1995 |
| Externally published | Yes |
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Lithium insertion into Li3CrO4 and related LISICON materials. / Garcia-Martin, S.; Robertson, A. D.; Dissanayake, M. A K L; West, A. R.
In: Solid State Ionics, Vol. 76, No. 3-4, 03.1995, p. 309-314.Research output: Contribution to journal › Article
TY - JOUR
T1 - Lithium insertion into Li3CrO4 and related LISICON materials
AU - Garcia-Martin, S.
AU - Robertson, A. D.
AU - Dissanayake, M. A K L
AU - West, A. R.
PY - 1995/3
Y1 - 1995/3
N2 - The electrochemical intercalation of lithium into chromium (V)-containing oxides isostructural with β- and γ-Li3PO4 has been studied. β-Li3CrO4 can reversibly intercalate around 1 mole of Li ions per formula unit to give Li3 + xCrO4: 0 < x < 1 with a discharge capacity of 196 mAh g-1; electrochemical data indicate the possible existence of a two-phase region in the approximate range 0.3 < x < 0.8. Fully intercalated material appears to have a γ-related structure. γ-Li3.5Cr0.5Ge0.5O4, with a LISICON structure can reversibly intercalate up to 0.5 moles of Li ions per formula unit to give Li3.5 + xCr0.5Ge0.5O4: 0 < x < 0.5. During intercalation, the γ-phase transforms into a β-phase which is retained on deintercalation. The volume changes associated with (de) intercalation of both β and γ structures are small, ≪ 1%. During the β → γ transition, the orthorhombic c axis, and the unit cell volume, increase by ~ 2%.
AB - The electrochemical intercalation of lithium into chromium (V)-containing oxides isostructural with β- and γ-Li3PO4 has been studied. β-Li3CrO4 can reversibly intercalate around 1 mole of Li ions per formula unit to give Li3 + xCrO4: 0 < x < 1 with a discharge capacity of 196 mAh g-1; electrochemical data indicate the possible existence of a two-phase region in the approximate range 0.3 < x < 0.8. Fully intercalated material appears to have a γ-related structure. γ-Li3.5Cr0.5Ge0.5O4, with a LISICON structure can reversibly intercalate up to 0.5 moles of Li ions per formula unit to give Li3.5 + xCr0.5Ge0.5O4: 0 < x < 0.5. During intercalation, the γ-phase transforms into a β-phase which is retained on deintercalation. The volume changes associated with (de) intercalation of both β and γ structures are small, ≪ 1%. During the β → γ transition, the orthorhombic c axis, and the unit cell volume, increase by ~ 2%.
U2 - 10.1016/0167-2738(94)00295-4
DO - 10.1016/0167-2738(94)00295-4
M3 - Article
AN - SCOPUS:0029276772
VL - 76
SP - 309
EP - 314
JO - Solid State Ionics
JF - Solid State Ionics
SN - 0167-2738
IS - 3-4
ER -