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胡国荣, 刘智敏, 方正升, 王剑锋, 石迪辉, 秦庆伟
,-0001,():
-1年11月30日
作为一种新兴的微粉制备工艺,喷雾热分解技术(SP)已广泛应用于各种功能材料的制备。本文介绍喷雾热分解工艺过程及特点,对近年来SP在发光体材料、超导陶瓷、催化剂、锂电池正极材料等功能材料中的最新研究进展予以综合评述,对其前景作了展望。
喷雾热分解, 功能材料, 发光体材料, 超导陶瓷, 催化剂, 锂电池正极材料
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【期刊论文】Synthesis and characterization of LiFePO4/C compositeused as lithium storage electrodes ①
胡国荣, HU Guo-rong, ZHANG Xin-long, PENG Zhong-dong, LIAO Gang, YU Xiao-yuan
,-0001,():
-1年11月30日
LiFePO4/C composites with good rate capability and high energy density were prepared by adding sugar to the synthetic precursor. A significant improvement in electrode performance was achieved. The resulting carbon contents in the sample 1 and sample 2 are 3.06% and 4.95%(mass fraction), respectively. It is believed that the synthesis of LiFe2PO4 with sugar added before heating is a good method because the synthesized particles having uniform small size are covered by carbon. The performance of the cathodes was evaluated using coin cells. The samples were characterized by X2ray diffraction and scanning electron microscope observation. The addition of carbon limits the particles size growth and enables high electron conductivity. The LiFePO4/C composites show very good electrochemical performance delivering about 142 mAh/g specific capacity when being cycled at the C/ 10 rate. The capacity fade upon cycling is very small.
Li2ion battery, positive material, lithium iron phosphate, carbon2coated
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【期刊论文】Pilot study of mechanism of property2modified anode in aluminum electrolysis ①
胡国荣, XIAO Jin, YAN Gjian-hong, HU Guo-rong, LAI Yan-qing, WANG Xian-qian, LIU Ye-xiang
,-0001,():
-1年11月30日
On the basis of serial laboratory research and industrial test, the mechanism of saving energy and reducing carbon consumption of property2modified prebaked anode in aluminum electrolysis was discussed. It is considered that the anodic over voltage is affected by the concentration of carbon monoxide surrounding anode. The property2modified prebaked anode can restrain the production of carbon monoxide. The reason of reducing carbon consumption was also ana lyzed, the result shows that besides physical action, chemical action also exists in the process where additives change the reaction rate of anodes.
aluminum electrolysis, prebaked anode, additive
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【期刊论文】LiNi1/3Co1/3Mn1/3O2正极材料的413450型电池的性能
胡国荣, 谭显艳, 高旭光, 彭忠东
电池,2006,36(2):90~92,-0001,():
-1年11月30日
采用自制的LiNi1/3Co1/3Mn1/3O2作正极材料,以石墨作负极,组装成413450型锂离子电池。分别在25℃和55℃下 以310~412V为电压区间,1C充放电,对其电化学性能进行测试和研究。结果表明:55℃下电池的首次放电比容量为143mAh/g,25℃下为138mAh/g;电池在55℃下充放电循环85次,容量保持率为92115%。过充、热冲击和常温短路实验的顺利通过,证明样品材料有很好的安全性能。
锂离子电池, LiNi1/, 3Co1/, 3Mn1/, 3O2, 过充性能, 高温循环性能
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胡国荣, YU Xiao-yuan, , HU Guo-rong, PENG Zhong-dong, XIAO Jin, LIU Ye-xiang
,-0001,():
-1年11月30日
Layered LiNi1/3Co1/3Mn1/3O2 materials were synthesized using a nickel2cobalt2manganese carbonate pre2 cursor obtained by chemical co2precipitation. The [Ni1/3 Co1/3 Mn1/3] CO3 precursor and the LiNi1/3 Co1/3 Mn1/3 O2 powders were characterized by X2ray diff raction (XRD) and scanning elect ron micrograph (SEM). The SEM analysis shows that these particles possess uniform and spherical morphology. The elect rochemical properties of the LiNi1/3 2 Co1/3Mn1/3O2 cathode material for rechargeable lithium2ion bat teries such as the galvanostatic charge2discharge per formance and cyclic voltammet ry(CV) were measured. The result s show that an initial discharge capacity of 190. 29 mA·h·g-1 is obtained in the voltage range of 2.5 4.6 V and at a current rate of 0.1 C at 25 ℃. The discharge capacity increases linearly with the increase of the upper cut2off voltage limit.
lithiumion batteries, cathode material, layered st ructure, nickel2cobalt2manganese oxides
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