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超聲波沉淀法制備Y摻雜納米多相Ni(OH)2及其性能研究
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國家自然科學基金(10774030)；廣東省大學生創(chuàng)新實驗項目(1184510153)；廣州市科技計劃(2008J1-C161)；廣東工業(yè)大學教育教學改革重點項目(2010Z015)；廣東工業(yè)大學高教研究基金資助項目(2009E06)


Study on the Preparation of Y-doped Multiphase Nano-Ni(OH)2 by a Supersonic Precipitation Method and Its Electrochemical Performance
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    摘要:

    采用超聲波沉淀法制備了不同摩爾比例Y摻雜氫氧化鎳，對其粒度分布、結(jié)構及電化學性能進行了測試分析。XRD測試表明，樣品均為α和β相混合結(jié)構的Ni(OH)2。激光粒度測試表明，樣品均為納米顆粒，且分布均勻，平均粒徑在50~80 nm之間。分別將制備的樣品以8%比例與工業(yè)用微米級球鎳混合制成復合鎳電極，電極的可逆性和充電效率均隨Y摻雜比例增大先提高后下降，Y含量 1.17%時，其電極可逆性和充電效率達到最佳，放電比容量達到最大，0.1和0.5 C倍率下的比容量分別達到370和358 mAh/g，且具有較低充電電壓和較高放電平臺，該結(jié)果比目前市售鎳氫電池比容量(230~250 mAh/g)高48%~60%。對加超聲波和不加超聲波制備的樣品性能進行了比較

    Abstract:

    Nickel hydroxides doped with different yttrium contents were prepared by a supersonic co-precipitation method. Their particle size distribution, crystal structures and electrochemical performance were characterized. The XRD results show the co-existence of α and β phase in the nickel hydroxides. The laser particle size measurement indicates that all the samples are of nanoparticles, which are distributed uniformly with average size of 50-80 nm. Complex electrodes were prepared by mixing 8wt% nickel hydroxides with commercial micro-sized spherical nickel. The cyclic voltammetry results show that the reversibility and charge efficiency of the electrodes are increased initially and then decreased with the increase of Y content. The best reversibility and charge efficiency is observed in the electrodes with 1.17wt% Y. The discharge capacity reaches 370 mAh/g at 0.1 C and 358 mAh/g at 0.5 C for the 1.17wt% Y-doped electrodes, higher than the theoretical value of pure β-Ni(OH)2. The data is 48%-60% higher than the capacity of market Ni(OH)2 battery (230-250 mAh/g). F Furthermore, low charge potential and high discharge plateau are also observed. inally, the samples prepared under supersonic were compared with that without supersonic

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周焯均,朱燕娟,張仲舉,葉賢聰,伍尚改,鄭漢忠,林曉然,包 杰.超聲波沉淀法制備Y摻雜納米多相Ni(OH)2及其性能研究[J].稀有金屬材料與工程,2011,40(7):1287~1291.[Zhou Zhuojun, Zhu Yanjuan, Zhang Zhongju, Ye Xiancong, Wu Shanggai, Zheng Hanzhong, Lin Xiaoran, Bao Jie. Study on the Preparation of Y-doped Multiphase Nano-Ni(OH)2 by a Supersonic Precipitation Method and Its Electrochemical Performance[J]. Rare Metal Materials and Engineering,2011,40(7):1287~1291.]
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  • 收稿日期:2010-09-13
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