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北京石油化工学院2026年研究生招生接收调剂公告
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wayneturner

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[资源] 两篇最新锂电池高能正极材料的研究和UCLA dunn在Science上的一篇关于电化学储能的综述

UCLA的dunn教授在science上发表的一篇关于电化学储能的综述

Nature Materials上的最新正极材料研究
摘要:Nickel-rich layered lithium transition-metal oxides, LiNi1−xMxO2 (M = transition metal), have been under intense investigationas high-energy cathode materials for rechargeable lithiumbatteries because of their high specific capacity and relatively low cost1–3. However, the commercial deployment of nickel-rich oxides has been severely hindered by their intrinsic poor thermal stability at the fully charged state and insufficientcycle life, especially at elevated temperatures 1–6. Here, we report a nickel-rich lithium transition-metal oxide with a veryhigh capacity (215 mA h g−1), where the nickel concentration decreases linearly whereas the manganese concentration increases linearly from the centre to the outer layer of each particle. Using this nano-functional full-gradient approach, we are able to harness the high energy density of the nickel-rich core and the high thermal stability and long life of the manganese-rich outer layers. Moreover, the micrometre-size secondary particles of this cathode material are composed of aligned needle-like nanosize primary particles, resulting in a high rate capability. The experimental results suggest that this nano-functional full-gradient cathode material is promising for applications that require high energy, long calendar life and excellent abuse tolerance such as electric vehicles.
J`DPP%RAW{R)AI~[KXSQ8PQ.jpg[ Last edited by wayneturner on 2012-12-21 at 11:08 ]
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95楼2012-12-12 14:47:30
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Thanks!
12楼2012-12-08 04:42:29
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aa11112楼
2012-12-07 18:45   回复  
顶一下,感谢分享!
justinluo3楼
2012-12-07 18:54   回复  
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2012-12-07 20:11   回复  
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2012-12-07 20:42   回复  
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2012-12-07 20:56   回复  
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2012-12-07 20:58   回复  
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2012-12-07 23:31   回复  
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2012-12-07 23:32   回复  
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2012-12-08 00:16   回复  
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2012-12-08 00:56   回复  
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2012-12-08 06:30   回复  
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