Improving Electrochemical Stability by Transition Metal Cation Doping for Manganese in Lithium-rich Layered Cathode, Li1.2Ni0.13Co0.13Mn0.54-xMxO2 (M = Co, Cr and Fe)
IR@CECRI: CSIR-Central Electrochemical Research Institute, Karaikudi
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| Title |
Improving Electrochemical Stability by Transition Metal Cation Doping for Manganese in Lithium-rich Layered Cathode, Li1.2Ni0.13Co0.13Mn0.54-xMxO2 (M = Co, Cr and Fe)
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| Creator |
Ramesha, R.N.
Laisa, C.P. Ramesha, K. |
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| Subject |
Lithium batteries
Electrochemical Power Sources |
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| Description |
The capacity of high manganese containing lithium-rich cathodes tends to fade quickly upon cycling. In
this work, we studied the effect of cation doping for manganese in Li1.2Ni0.13Co0.13Mn0.54-xMxO2 (M = Co,
Cr and Fe and x < 0.15) in improving the cycling stability. The Cr+3 and Fe+3 doped samples exhibit
considerable suppression of oxygen loss during the
first charge. The
first cycle irreversible capacity loss
also decreased upon substitution. Further, there is significant improvement in cycling stability; after 50
cycles the pristine sample exhibits only 75% capacity retention which is improved to 88% with Co+3
doping (x = 0.10) and to 93.7% with Cr+3 doping (x = 0.10). Similarly Fe+3 doping (x = 0.05) also improves
the capacity retention to 90%. Another notable observation from charge-discharge profiles is that the
voltage decay during cycling has been reduced for doped samples. The charge-discharge derivative (dQ/
dV) data indicate that Cr+3 and Fe+3 doping retards spinel phase formation during long cycling thereby
reducing the voltage decay. These studies further highlight the importance of
fine tuning the composition
of lithium-rich cathodes for optimizing the performance in terms of decreasing irreversible capacity loss,
capacity degradation and voltage decay.
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| Publisher |
Elsevier B.V.
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| Date |
2017-08-09
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| Type |
Article
PeerReviewed |
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| Format |
application/pdf
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| Identifier |
http://cecri.csircentral.net/3222/1/056-2017.pdf
Ramesha, R.N. and Laisa, C.P. and Ramesha, K. (2017) Improving Electrochemical Stability by Transition Metal Cation Doping for Manganese in Lithium-rich Layered Cathode, Li1.2Ni0.13Co0.13Mn0.54-xMxO2 (M = Co, Cr and Fe). Electrochimica Acta, 249. pp. 377-386. ISSN 0013-4686 |
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| Relation |
http://www.elsevier.com/loca te/ele cta cta
http://cecri.csircentral.net/3222/ |
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