Review—High-Capacity Li[Ni1-xCox/2Mnx/2]O2(x= 0.1, 0.05, 0) Cathodes for Next-Generation Li-Ion Battery
| Autor: | Moon Ho Choi, Chong Seung Yoon, Byung Beom Lim, Yang-Kook Sun, Eung Ju Lee |
|---|---|
| Rok vydání: | 2015 |
| Předmět: |
chemistry.chemical_classification
Battery (electricity) Renewable Energy Sustainability and the Environment Analytical chemistry Salt (chemistry) High capacity Condensed Matter Physics Cathode Surfaces Coatings and Films Electronic Optical and Magnetic Materials Ion law.invention chemistry Chemical engineering Cathode material law Phase (matter) Materials Chemistry Electrochemistry Capacity loss |
| Zdroj: | Journal of The Electrochemical Society. 162:A2483-A2489 |
| ISSN: | 1945-7111 0013-4651 |
| DOI: | 10.1149/2.0101514jes |
| Popis: | LiNiO2 with theoretical capacity of 275 mAh g−1 is regarded as a promising cathode material for Li-ion batteries, but its potential capacity has not been fully realized due to the severe capacity loss in the first charge/discharge cycle. Via co-precipitation method, we synthesized Li[Ni0.90Co0.05Mn0.05]O2, Li[Ni0.95Co0.025Mn0.025]O2, and LiNiO2 which delivered 221, 230, and 240 mAh g−1, respectively, when cycled from 2.7 to 4.3 V vs. Li0/Li+ at 0.1 C and retained ~70% of the initial capacity after 100 cycles. To date, such high reversible capacities are not yet to be reported from the Ni-rich Li[Ni1−x−yCoxMny]O2 cathodes. The observed high capacities were attributed to the presence of a rock salt phase from severe cation mixing and excess Li ions in the host structure. It is believed that the rock salt phase stabilized the host structure in the delithiated state while the excess Li allowed the Li ions percolated through the rock salt phase which would be electrochemically inactive otherwise. |
| Databáze: | OpenAIRE |
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