摘要
以金属锂为负极,硫为正极的锂硫二次电池的能量密度高达2 600 Wh/kg,仅次于锂-空气二次电池,成为电动汽车及电站储能电池的研究热点。由于液态电解质溶解大量的放电产物聚硫化锂等因素,导致锂硫电池的容量衰减快、循环寿命短及自放电率大,这也是目前锂硫电池难以商业化的主要问题。围绕硫多孔碳复合材料、电解液添加剂及离子交换隔膜等,综述国内外最新研究进展,以期得到研究思路。
Lithium/sulfur battery, fabricated with metal lithium as anode and sulfur as cathode, due to its high theoretical energy density（2 600 Wh/kg）, lower than lithium-air battery, has become the hot research of electric vehicles and power plant energy storage battery. Due to the strong chemical activity of metallic lithium, insulating properties of sulfur and a mass discharge product of polysulfide dissolved in liquid electrolyte, which lead to low cycling efficiency, short cycle life, and a high self-discharge rate of lithium-sulfur battery, lithium sulfur batteries are difficult to commercialize. Based on sulfur-porous carbon composite materials, electrolyte additive and ion exchange membrane, the progress at domestic and overseas was reviewed, and the new ideas were proposed.
出处
《电源技术》
CAS
CSCD
北大核心
2016年第5期1142-1144,共3页
Chinese Journal of Power Sources
关键词
锂硫电池
聚硫化物
电解液
lithium/sulfur battery
polysulfide
electrolyte
