AA型快充MH/Ni电池的制备和性能

结合AA型2 000 mAh快充MH/Ni电池的研制,对工艺参数进行了研究,结果表明:在正、负极设计容量比为1.00:1.50,正、负极厚度分别为0.50 mm和0.25 mm,正极浆料中加入3%TiO2添加剂,单体电池电解液加入量为2.38 g时.所制备的MH/Ni电池充电时间只需要15 min,放电容量为常规放电容量的86.7%,电池的表面温度不到50℃.     

高比容量镍氢电池的制备及电化学性能

Cylindrical nickel metal hydride （Ni-MH） battery with high specific volume capacity was prepared by using the oxyhydroxide Ni（OH）2 and AB5 type hydrogen storage alloy and adjusting the designing parameters of positive and negative electrodes. The oxyhydroxide Ni（OH）2 was synthesized by oxidizing spherical β-Ni（OH）2 with chemical method. The X-ray diffraction （XRD） patterns and the Fourier transform infrared （PT-IR） spectra indicated that 7-NiOOH was formed on the oxyhydroxide Ni（OH）2 powders, and some H2O molecules were inserted into their crystal lattice spacing. The battery capacity could not be improved when the oxyhydroxide Ni（OH）2 sample was directly used as the positive active materials. However, based on the conductance and residual capacity of the oxyhydroxide Ni（OH）2 powders, AA size Ni-MH battery with 2560 mA.h capacity and 407 W·h·L^-1 specific volume energy at 0.2C was obtained by using the commercial spherical β-Ni（OH）2 and AB5-type hydrogen-storage alloy powders as the active materials when 10% mass amount of the oxyhydroxide Ni（OH）2 with 2.50 valence was added to the positive active materials and subsequently the battery designing parameters were adjusted as well. The as-prepared battery showed 70% initial capacity after 80 cycles at 0.5C. The possibility for adjusting the capacity ratio of positive and negative electrodes from 1 ： 1.35 to 1 ： 1.22 was demonstrated preliminarily. It is considered the as-prepared battery can meet the requirement of some special portable electrical instruments.     

LixMnO2的熔盐浸渍法合成和性能

采用熔盐浸渍法合成了用于可充锂电池的正极材料锂锰氧化物(LixMnO2),使用原子吸收光谱、充放电测试、X射线衍射、傅立叶红外光谱等方法对合成产品的化学成分、电化学性能及结构进行了分析,确定了最佳锂锰配比为0.30∶1.00。将Li0.30MnO2作为正极材料的2016型扣式锂电池,在2.00~3.25 V之间,用0.5 mA电流100%DOD充放电时,循环30次后的容量衰减了7.3%;2.0 mA电流100%DOD充放电时,循环20次后的容量保持率为89.4%。     

铁电极材料在电池中的应用

综述了铁及其化合物作为电极材料在各电池体系中的应用与研究现状,并指出了它们的优缺点,这些电池包括了铁镍电池、超铁电池、热电池、光电化学电池、锂离子电池等。同时指出,基于铁电极材料在原材料、环保和某些电化学性能方面所具有的优势,为此进一步开展对铁材料在电池体系中的应用研究是很有必要的。