Inorganic polymer phosphazene disulfide as cathode material for rechargeable lithium batteries |
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| Affiliation: | 1. State Key Laboratory of Organic–Inorganic Composites, Beijing University of Chemical Technology, Beijing 100029, PR China;2. Beijing Laboratory of Biomedical Materials, Beijing University of Chemical Technology, Beijing 100029, PR China;3. Department of Geriatric Dentistry, Peking University School and Hospital of Stomatology, Beijing 100081, PR China |
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| Abstract: | Novel inorganic network polymer phosphazene disulfide [(NPS2)3]n was synthesized by a solution cross-link method. IR and element content analysis confirmed the polymer's molecular structure. The polymer has an average particle size of d0.5 = 7.7 μm and the specific surface area is 57.4 m2 g− 1. TG/DTA analysis showed that [(NPS2)3]n underwent a decomposition reaction from 200 to 300 °C. When used as cathode material in lithium batteries, its initial discharge capacity was 459.1 mAh g− 1, which is almost 93.5% of theoretical specific capacity (490.9 mAh g− 1). After 30 charge–discharge cycles, the discharge capacity of [(NPS2)3]n stabilized at approximately 400.1 mAh g− 1 which revealed an excellent cyclic ability. Therefore [(NPS2)3]n is of great potential as cathode material for secondary lithium batteries. |
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