引用本文:
刘建华, 王丹, 刘圣迁, 宋世栋, 唐致远. 掺碳球形NiOH2的特性[J]. 应用化学,
2003, 20(6): 552-556.
Citation: LIU Jian-Hua, WANG Dan, LIU Sheng-Qian, SONG Shi-Dong, TANG Zhi-Yuan. Characteristics of Spherical Ni(OH)2 Doped with Carbon[J]. Chinese Journal of Applied Chemistry, 2003, 20(6): 552-556.
Citation: LIU Jian-Hua, WANG Dan, LIU Sheng-Qian, SONG Shi-Dong, TANG Zhi-Yuan. Characteristics of Spherical Ni(OH)2 Doped with Carbon[J]. Chinese Journal of Applied Chemistry, 2003, 20(6): 552-556.
掺碳球形NiOH2的特性
摘要:
采用氨络合液相共沉淀法,同时加入电子导电剂(石墨粉或乙炔黑细粉),制备出了掺碳球形Ni(OH)2,对其进行了XRD测试和SEM观察。结果证实电子导电剂被嵌入到球形Ni(OH)2颗粒中。将掺碳球形Ni(OH)2制备成电极后,对其进行了充放电实验。结果表明,未添加导电剂时,0.2C放电容量为270 mA·h/g,中点电位为302 mV,2C放电容量为220 mA·h/g。添加质量分数为5%石墨后,0.2C放电容量为253 mA·h/g,中点电位为320 mV,2C放电容量为216 mA·h/g;添加质量分数为5%乙炔黑后,0.2C放电容量为258 mA·h/g,中点电位为324 mV,2C放电容量为222 mA·h/g。随电子导电剂加入量增多,则镍电极的放电容量有所减少,放电中点电位提高,同时使其高倍率下的放电能力加强。
English
Characteristics of Spherical Ni(OH)2 Doped with Carbon
Abstract:
The doped spherical Ni(OH)2 was prepared by ammonia complexing liquid phase codeposition method,using graphite powder and acetylene-black as dopants.XRD and SEM results indicated the intercalation of carbon dopants within the spherical Ni(OH)2.The charge-discharge experiments showed that for Ni(OH)2 electrodes without using graphite powder and acetylene-black as dopants,the discharging capacity and voltage at plateau were 270 mA·h/g by 0.2C,220 mA·h/g by 2C and 302 mV,respectively;for electrodes doped with 5.0% graphite,the corresponding values were 253 mA·h/g,216 mA·h/g and 320 mV,respectively;for electrodes doped with 5.0% acetylene-black,the corresponding values were 258 mA·h/g,222 mA·h/g and 324 mV,respectively.With electronic conductor being increased,the discharge capacity is decreased and the plateau voltage and the discharge ability at high rate are increased.
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Key words:
- spherical Ni(OH)2
- / electronic conductor
- / charge-discharge performance
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