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首页> 外文期刊>Journal of power sources >Electrochemical studies of low-temperature processed nano-crystalline LiMn_2O_4 thin film cathode at 55 deg C
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Electrochemical studies of low-temperature processed nano-crystalline LiMn_2O_4 thin film cathode at 55 deg C

机译:55℃低温处理的纳米晶LiMn_2O_4薄膜阴极的电化学研究

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摘要

LiMn_2O_4 thin films with nano-crystals less than 100 nm were successfully grown on polished stainless steel substrates at 400 deg C and 200 m Torr of oxygen by pulsed laser deposition. A maximum discharge capacity of 62.4mu Ah cm~(-2) mu m~(-1) cycled between 3.0 and 4.5 V with a current density of 20 mu Ah cm~(-2) was achieved. The effect of several over discharge cycles was negligible, and both the effect of Jahn-Teller distortion at low potentials on capacity loss and structure instability at high potentials were effectively inhibited in this nano-crystalline film, resulting in an excellent cycling stability with a very low fading rate of capacity up to 500 cycles at 55 deg C.
机译:通过脉冲激光沉积,在400℃和200 m Torr的氧气下,在抛光的不锈钢基板上成功生长了纳米晶体小于100 nm的LiMn_2O_4薄膜。实现了最大放电容量62.4μAhcm·(-2)μm·m-1(-1),在3.0和4.5V之间循环,电流密度为20μAhcm·(-2)。几个过度放电循环的影响可以忽略不计,并且在该纳米晶体膜中有效地抑制了低电势下的Jahn-Teller畸变对容量损失的影响和高电势下的结构不稳定性,从而产生了极好的循环稳定性在55摄氏度下容量下降率低至500个循环。

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