Li3V2(PO4)3 cathode material was prepared by a carbon-thermal reduction (CTR) process. V2O5, LiOH-H2O, NH4H2PO4 and C were used as starting materials to synthesize Li3V2(PO4)3 by sintering the mixture at 800℃for 24 h...Li3V2(PO4)3 cathode material was prepared by a carbon-thermal reduction (CTR) process. V2O5, LiOH-H2O, NH4H2PO4 and C were used as starting materials to synthesize Li3V2(PO4)3 by sintering the mixture at 800℃for 24 h. The property of the Li3V2(PO4)3 sample was investigated by X-ray diffraction (XRD), scanning electron microscopy (SEM) and electrochemical measurement. The results show that the Li3V2(PO4)3 sample has the same monoclinic structure as the Li3V2(PO4)3 sample synthesized by hydrogen reduction method. The particle size is about 1.5μm together with homogenous distribution. The initial discharge capacity of Li3V2(PO4)3 powder is 120 mA·h·g-1 at the rate of 0.1C, and the capacity retains 112 mA·h·g-1 after 30 cycles.展开更多
热界面材料是解决现代高功率和高集成化电子器件热量聚集和耗散的有效手段。基于三维网络结构调控导热性能的策略,以三聚氰胺泡沫(MF)为骨架,采用化学表面改性制备碳纳米管三维网络结构(CNT),并采用真空浸润法制备碳纳米管/天然橡胶热...热界面材料是解决现代高功率和高集成化电子器件热量聚集和耗散的有效手段。基于三维网络结构调控导热性能的策略,以三聚氰胺泡沫(MF)为骨架,采用化学表面改性制备碳纳米管三维网络结构(CNT),并采用真空浸润法制备碳纳米管/天然橡胶热界面复合材料(CNT/NR),研究CNT含量对材料微观结构、导热性能和热管理性能的影响。结果表明,当CNT的含量为2.2%(质量分数)时,CNT可附着于MF骨架并呈现完整连续的三维网络结构,其热界面复合材料垂直面外的导热率为1.58 W m^(-1) K^(-1),拉伸强度为12.9 MPa,断裂伸长率为489%,并具有显著的热管理性能,这表明CNT/NR热界面复合材料有望成为一种机具应用价值的热管理材料。展开更多
基金Project(50302016) supported by the National Natural Science Foundation of China
文摘Li3V2(PO4)3 cathode material was prepared by a carbon-thermal reduction (CTR) process. V2O5, LiOH-H2O, NH4H2PO4 and C were used as starting materials to synthesize Li3V2(PO4)3 by sintering the mixture at 800℃for 24 h. The property of the Li3V2(PO4)3 sample was investigated by X-ray diffraction (XRD), scanning electron microscopy (SEM) and electrochemical measurement. The results show that the Li3V2(PO4)3 sample has the same monoclinic structure as the Li3V2(PO4)3 sample synthesized by hydrogen reduction method. The particle size is about 1.5μm together with homogenous distribution. The initial discharge capacity of Li3V2(PO4)3 powder is 120 mA·h·g-1 at the rate of 0.1C, and the capacity retains 112 mA·h·g-1 after 30 cycles.
文摘热界面材料是解决现代高功率和高集成化电子器件热量聚集和耗散的有效手段。基于三维网络结构调控导热性能的策略,以三聚氰胺泡沫(MF)为骨架,采用化学表面改性制备碳纳米管三维网络结构(CNT),并采用真空浸润法制备碳纳米管/天然橡胶热界面复合材料(CNT/NR),研究CNT含量对材料微观结构、导热性能和热管理性能的影响。结果表明,当CNT的含量为2.2%(质量分数)时,CNT可附着于MF骨架并呈现完整连续的三维网络结构,其热界面复合材料垂直面外的导热率为1.58 W m^(-1) K^(-1),拉伸强度为12.9 MPa,断裂伸长率为489%,并具有显著的热管理性能,这表明CNT/NR热界面复合材料有望成为一种机具应用价值的热管理材料。
