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查看更多0个回答 . 26人已关注
表面等离子体共振是否会影响半导体能带间隙?小弟刚入手半导体光催化方向，现遇到一个疑问，求助朋友。（半道出家，没有理论基础，问的问题可能挺粗浅，勿喷哈）? ?? ???目前关注了Au、Ag等贵金属在TiO2可见光光催化中的工作，其中，看到不少关于Au(Ag)|SiO2|TiO2“三明治”结构的报道。Au在光的激发下，其表面出现很强的表面等离子体共振(resonant surfaceplasmons)，Au与TiO2之间的偶极子相互作用将等离子能量转移至半导体，并且促使半导体产生电子/空穴对。（Cushing, S. K. et al. Photocatalytic Activity Enhanced by Plasmonic Resonant Energy Transfer from Metal to Semiconductor. J. Am. Chem. Soc. 134, 15033-15041）那么在这个过程中，半导体的能带间隙会不会有变化呢？如果有的话，能通过什么手段进行表征呢？查看更多10个回答 . 11人已关注
第1天
关注盖德视界
添加小助手
