【摘 要】
：
Hydrogen produced by the water splitting process could potentially address the challenge of the increasing global energy demand and continuous depletion of fossil fuel-reserves.Currently,platinum base
【机 构】
：
Wuhan National Laboratory for Optoelectronics,Huazhong University of Science and Technology,Wuhan 43
论文部分内容阅读
Hydrogen produced by the water splitting process could potentially address the challenge of the increasing global energy demand and continuous depletion of fossil fuel-reserves.Currently,platinum based noble metals exhibit the best electro-activity towards hydrogen evolution reaction (HER),but the limited natural reserves and prohibitively high price of Pt have largely hindered their widespread application.
其他文献
LiNi0.5Mn1.5O4 (LNMO) material,with a theoretical capacity of 147 mAh g-1 and a high discharge voltage (4.7 V vs.Li/Li+) plateau,has emerged as a promising cathode material for high energy density lit
通过液相沉淀法结合高温固相法制备了Sm掺杂的LiFePO4/C,测试结果表明少量Sm掺杂能够优化颗粒形貌,减小极化过电势和传荷电阻,从而提高了材料的电化学性能.大量的Sm掺杂会形成过多的SmPO4能够阻碍材料的电化学性能.电化学测试结果表明LiFe0.99Sm0.01PO4/C在1C,2C,5C和10C下的放电容量分别为148.1,133.4,117.5和106.6mAh g-1.并且材料具有很好
LiMn1-xTixO2 (x =0,0.01,0.02,0.03) cathode materials were successfully prepared by the hydrothermal treatment of Mn2O3 and TiO2 with excess LiOH·H2O aqueous solution at 150℃.The crystal structure and
As a promising cathode materials,LiFePO4 [1] received much attentions owing to its low cost,environmental compatibility,reasonable theoretical specific capacity (ca.170 mAhg-1),acceptable operating vo
The thermal stability of a FeF3 cathode was studied by differential scanning calorimetry (DSC).The lithiated electrode was found to be more thermally stable than delithiated one.On the other hand,the
Since commercialization in 1990,the rechargeable lithium-ion batteries (LIBs) are widely used as power sources for mobile telephones,computers,toys and so on.However,extending electrode materials for
Among the existing cathode materials,V2O5 is a promising cathode candidate because of its high energy density,abundance,easy synthesis,as well as low cost.However,due to quite low diffusion coefficien
镍钴锰三元正极材料因其高容量和较稳定的性能得到研究者的广泛关注.三元复合型材料LiNi1-x-yMnxCoyO2结合了钴酸锂、镍酸锂、锰酸锂三种材料的优点,使其具有镍酸锂的高容量特征,拥有锰酸锂低廉的价格,保持材料稳定性的优点,具备了钴酸锂稳定的结构,抑制了阳离子混排效应,使层状结构稳定的优点[1].
尖晶石LiMn1.5Ni0.5O4具有原料丰富、成本低、倍率性能好、工作电压高(～4.7 V)等优点,在过去的30年间被广泛研究,是很有潜力的锂离子电池阴极材料之一[1,2].然而,当材料在3.0-5.0 V目区间充放电时,理论容量仅147 mAh/g,限制了其在高能领域的应用.
由于具有原料丰富、低成本、环境友好、工作电压高(约4 V)等优点,LiMn2O4锂离子电池电极材料在过去的30年间被广泛研究.对高能量的需求推动了对具有多电子氧化还原中心材料的研究[1],这使得LiMn2O4成为一种很有研究前景的材料,因为该材料在宽电位区间(如2-4.5 V)下Li+离子完全嵌入四面体8a位和八面体16c位时可达296 mAh g-1的理论容量.