期刊
CHINESE JOURNAL OF POLYMER SCIENCE
卷 24, 期 3, 页码 307-313出版社
SPRINGER
DOI: 10.1142/S0256767906001333
关键词
PVC disulfide (2SPVC); cathode; lithium battery; capacity; cycle
PVC disulfide (2SPVC) was synthesized by solution crosslink and its molecular structure was confirmed by infrared spectrum. 2SPVC's specific area is 36.1 m(2) . g(-1) tested by stand BET method, and granularity experiment gives out the particle size of d(0.5) = 11.3 mu m. With SEM (Scanning Electron Microscope) experiment the surface morphology and particle shape of 2SPVC were observed. Cyclic voltammetry (scan rate: 0.5 mV . s(-1)) shows that 2SPVC experience an obvious S-S redox reaction in charge-discharge process. When 2SPVC was used as cathode material for secondary lithium battery in a 1 mol . L-1 solution of lithium bis(trifluoromethylsulfonyl) imide (Li(CF3SO2)(2)N) in a 5:45:50 volume ratio mixture of o-xylene (oxy), diglyme (DG) and dimethoxymethane (DME) at 30 degrees C, the first discharge capacity of 2SPVC is about 400.3 mAb . g(-1) which is very close to its theoretical value (410.5 mAh . g(-1)) at a constant discharge current of 15 mA . g(-1). It can retain at about 346.1 mAh . g(-1) of discharge capacity after 30 charge-discharge cycles. So 2SPVC is a very promising cathode candidate for rechargeable lithium batteries.
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