微乳液法制备氧化铜阵列应用于钠离子电池

CuO arrays synthesized by microemulsion method as anodes for sodium-ion batteries

采用微乳液法制备了氧化铜纳米阵列,应用于钠离子电池负极。氧化铜阵列结构直接生长于导电铜片上,有利于电子传输、加快电化学反应速率,且氧化铜阵列结构存在开放空间,当进行充放电测试时,氧化铜纳米阵列可以为钠离子嵌入脱出引起的体积膨胀提供缓冲作用,显著提高电池在高倍率下的循环性能与倍率性能。

CuO arrays was synthesized on copper foils by microemulsion method. The CuO array films were directly employed as anode electrodes for sodium-ion batteries. The open space between CuO nanoarrays not only allowed for diffusion of electrolyte into the inner region of materials, but also could provide ample spaces to sustain the volume change associated with sodium insertion/extraction during charge and discharge tests. The CuO array films show good contact between the arrays and the current collecting substrates, thus exhibiting better rate performance and enhanced cycling life.