无机材料学报

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钡镁锰矿合成及在水溶液中电化学性质研究

夏熙; 刘斌   

  1. 新疆大学应用化学研究所, 乌鲁木齐 830046
  • 收稿日期:1999-08-12 修回日期:1999-10-11 出版日期:2000-08-20 网络出版日期:2000-08-20

Synthesis of Mg-Todorokite and Its Electrochemical Behavior in Aqueous Electrolytes

XIA Xi; LIU Bin   

  1. Institute of Applied Chemistryl Xinjiang University; Urumqi; 830046 China
  • Received:1999-08-12 Revised:1999-10-11 Published:2000-08-20 Online:2000-08-20

摘要: 合成了一种二氧化锰电池正极材料.用改进的碱性条件下合成晶型良好的纳米δ-MnO,合成出了含 Mg2+的钡镁锰矿(Todorokite),经 XRD、 TEM测试表明其为粒度均匀的纳米大隧道(3×3)MnO,并在碱性和中性电液中对样品进行恒流放电,循环伏安等电化学性能测试,结果表明循环稳定性良好。

关键词: 含镁钡镁锰矿, 大隧道结构, 恒流放电, 循环伏安

Abstract: A novel synthesis of the large tunnel structure Mg-containing Todorokite from nano6-MnO2 and 3mol/L MgCl2 in a higher pressure caldron was described. XRD and TEM results confirm that Mg-Todorokite is also a nano-phase MnO2 with homogeneous particle size. Electrochemical studies on constant current discharge and cyclic behavior of Mg-Todorokite in 9mol/L KOH or in 5mol/L LiNO3 aqueous electrolytes show that it possesses a lower open circuit voltage, and a good cycling performance.

Key words: Mg-Todorokite, large tunnel structure, constant current discharge, cyclic voltammetry

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