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Electrochemical and Thermal Behaviour of Li[Li x (Ni0.3Co0.1Mn0.6)1–x ]O2 (x = 0.09, 0.11) Cathode Materials for Lithium Rechargeable Batteries

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Abstract:

High rate capable Mn-rich layered Li[Li x (Ni0.3Co0.1Mn0.6)1–x ]O2 (x = 0.09, 0.11) cathode materials that are fully charged are investigated with respect to stability. Differential scanning calorime-try is used to determine the thermal stability of cathode material compositions together with PVdF binder and a conductive agent by heating from 30 °C to 400 °C at 10 °C/min. In the Li[Li x (Ni0.3Co0.1Mn0.6)1–x ]02 (x = 0.09, x = 0.11) cathode materials, the exothermic reaction started at 100 °C. Due to thermal runway, a sharp peak was observed at 279.25 °C for the material of x = 0.09 with exothermic heat generation of 168.4 J/g. For the Mn-rich cathode material, where x = 0.11, two relatively smaller peaks appeared at 250.72 °C and 268.60 °C with heat evolution of 71.49 J/g and 93.67 J/g, respectively. These layered cathode materials are thermally stable. The x = 0.09 composition shows huge heat flow occurrence when compared to the x = 0.11. It is concluded from a heat generation analysis that the two Mn-rich cathode materials are thermally stable for lithium rechargeable batteries.

Document Type: Research Article

DOI: http://dx.doi.org/10.1166/jnn.2012.5551

Publication date: April 1, 2012

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  • Journal for Nanoscience and Nanotechnology (JNN) is an international and multidisciplinary peer-reviewed journal with a wide-ranging coverage, consolidating research activities in all areas of nanoscience and nanotechnology into a single and unique reference source. JNN is the first cross-disciplinary journal to publish original full research articles, rapid communications of important new scientific and technological findings, timely state-of-the-art reviews with author's photo and short biography, and current research news encompassing the fundamental and applied research in all disciplines of science, engineering and medicine.
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