Charge-discharge mechanism of mechanically alloyed NiS used as a cathode in rechargeable lithium batteries
Charge-discharge mechanism of mechanically alloyed NiS used as a cathode in rechargeable lithium batteries
复制标题
DOI：
10.1016/s0925-8388(03)00380-3
复制
发表时间：
2003-10-27
影响因子：
6.2
通讯作者：
Lee, JY
中科院分区：
文献类型：
--
作者：
Han, SC;Kim, KW;Lee, JY
以硫化镍（NiS）作为锂可充电电池的正极材料，采用PEO固体聚合物电解质在80℃高温下进行充放电。将极细镍金属粉末与硫粉在氩气下球磨12 h，以合成均匀的NiS相。通过非原位XRD测量发现，在放电过程中，ni阴极活性物质转变为Ni3S2、镍和硫等其他相。在PEO电解液下，NiS正极在1.5 V vs. Li/Li+条件下的初始放电容量为580 mAh/g NiS。它具有良好的循环性能，即使在PEO固体聚合物电解质下循环200次后，仍能保持93%的初始放电容量。(C) 2003 Elsevier B.V.版权所有
Nickel sulfide (NiS) as a cathode material for a lithium rechargeable battery was charged and discharged at elevated temperature (80 degreesC) using a PEO solid polymer electrolyte. In order to synthesize a homogeneous NiS phase, very fine nickel metal powder was ball milled with sulfur powder for 12 h under argon gas. We found using ex-situ XRD measurements that the NiS cathode active material was transformed into other phases such as Ni3S2, nickel and sulfur during discharge. The initial discharge capacity of the NiS positive electrode was 580 mAh/g NiS at 1.5 V vs. Li/Li+ with PEO electrolyte. It has good cycling properties, retaining 93% of the initial discharge capacity even after 200 cycles with a PEO solid polymer electrolyte. (C) 2003 Elsevier B.V. All rights reserved.