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Zhang C.,South China Agricultural University | Liu W.,South China Agricultural University | Liu W.,Guangdong Brunp Recycling Technology Co. | Chen D.,Northwestern University | And 4 more authors.
Electrochimica Acta | Year: 2015

Uniform FeCO3 cubes with edge length of ∼300 nm were prepared by a facile one-step hydrothermal reaction and studied as anode material for lithium-ion batteries. Interestingly, the FeCO3 anode has an extremely high initial specific capacity of 1796 mAh g-1. After cycling at a current rate of 200 mA g-1 for 130 cycles, an excellent discharge capacity of 761 mAh g-1 is still maintained. Moreover, the FeCO3 anode exhibits significant high-rate capability, e.g., ∼430 mAh g-1 is obtained at a current rate of 1200 mA g-1. The observation of the FeCO3 cubes represents an important development of realizing both high capacity and good cycleability in conversion type anode materials for lithium-ion battery at the same time. Such cheap, easy-to-make, and environmentally benign material is promising for practical deployment for lithium ion batteries anode. © 2015 Elsevier Ltd. All rights reserved. Source

Yu H.-J.,Guangdong Brunp Recycling Technology Co. | Xie Y.-H.,Guangdong Brunp Recycling Technology Co. | Zhang T.-Z.,China Automotive Technology and Research Center
Zhongguo Youse Jinshu Xuebao/Chinese Journal of Nonferrous Metals | Year: 2014

Recently, Ni-MH battery and lithium ion battery as high-energy vehicle power batteries have been developed rapidly for some advantages, such as high energy density, fast process of charge and discharge, long cycle life, non-pollution. However, the battery capacity decreases after hundreds of charge-discharge cycles, which finally leads to the battery scrap. From the view of environmental protection, natural resources conservation and lower the cost, the battery recycling is necessary. The authors summarized the methods of Ni-MH battery and lithium ion battery recycling in domestic and foreign researches, including the hydrometallurgical processing method, pyrometallurgical processing method and combined processing method, and each method was evaluated. And then an overview was given about secondary pollution, security problems and solutions in the existing methods, which lays a foundation for future recycling of traction battery in China. Source

Guangdong Brunp Recycling Technology Co. and Hunan Brunp Recycling Technology Co. | Date: 2013-04-28

A method for preparing nickel-cobalt-manganese hydroxide. The method comprises the following steps: (1) dissolving microcrystalline cellulose into water to obtain a suspension; and adding a nickel source, a cobalt source, and a manganese source into the suspension to obtain a solution containing nickel, cobalt, and manganese; (2) adding hexamethylenetetramine into the solution containing nickel, cobalt, and manganese, heating the reaction solution to 80-90 C., and reacting for 5-10 min, then heating with a microwave hydrothermal synthesis instrument at a frequency of 2450 MHz for 10-60 min; and (3) filtering the reaction solution obtained in step (2), and taking the filter residue, washing the filter residue with pure water and ethanol respectively, then drying, crushing, and screening the filter residue to obtain nickel-cobalt-manganese hydroxide. Nickel-cobalt-manganese hydroxide prepared from the abovementioned method has a uniform particle size and consistent morphology and structure; thus solving the problems of the uncontrollable appearance and structure and the inconsistent performances of the product caused by the vigorous reaction in the existing method for preparing nickel-cobalt-manganese hydroxide.

Xie Y.-H.,Guangdong Brunp Recycling Technology Co. | Yu H.-J.,Guangdong Brunp Recycling Technology Co. | Yu H.-J.,Power-battery | Li J.-M.,Guangdong Brunp Recycling Technology Co. | And 3 more authors.
Yejin Fenxi/Metallurgical Analysis | Year: 2014

Lithium iron phosphate sample is usually coated with a layer of carbon which would possibly have certain effect on sample dissolution by acid. The sample was dissolved with hydrochloric acid through heating for 10 min and filtered to remove carbon. Under acidic conditions, TiCl3 was used as reductive agent to reduce a small amount of Fe3+. After the addition of 15 mL of sulfuric acid and phosphoric acid mixture and three to four drops of 5 g/L sodium diphenylaminesulfonate, total iron in carbon-coated lithium iron phosphate was determined by potassium dichromate titrimetry. The common impurity metal elements in practical lithium iron phosphate had no interference with the determination. When the experimental method was applied to determine total iron in practical sample, the relative standard deviation (RSD) was less than 0.2%, and the standard addition recovery (RSD) was 99.7%-100.3%. The method was suitable for the determination of total iron in carbon-coated lithium iron phosphate in practical production and scientific research. Source

Xie Y.-H.,Guangdong Brunp Recycling Technology Co. | Yu H.-J.,Guangdong Brunp Recycling Technology Co. | Yu H.-J.,Power-battery | Li C.-D.,Guangdong Brunp Recycling Technology Co. | Li C.-D.,Power-battery
IEEE Transportation Electrification Conference and Expo, ITEC Asia-Pacific 2014 - Conference Proceedings | Year: 2014

With the rapid development of electric vehicle industry, standardization of electric vehicle traction battery is more and more attracted attention at home and abroad. This paper summarizes the recent domestic and overseas lithium-ion battery standards ISO 12405 series, IEC 62660 series, SAE J 2929, UL 2580, VDA 2007 and QC/T 743-2006. Various standard test content, test coverage, test results decision criteria, temporary problems and prospects of lithium-ion batteries standard were summarized and analyzed. Comparing the gap between the domestic and overseas standard of lithium-ion traction batteries for electric vehicles, opinions and suggestions development of China's lithium-ion traction battery standards were put forward. © 2014 IEEE. Source

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