Tsinghua University

Hong-fu Jin Precision Industry (shenzhen) Co., Ltd.

Jiangsu Huadong Institute of Li-ion Battery Co., Ltd

Yao-Wu Wang

Yu-Ming Shang

Xiao-Feng Xie

Jin-Hai Wang

Shu-Bo Wang

Jian Gao

Li Wang

Xiang-Ming He

Jian-Jun Li

Yong-Gang Liu

Jian-Wei Guo

Min Xu

Xiao Jin Zhao

Mou Fang

Zhong-Jia Dai

Ju-Ping Yang

Jing-Bo Chen

The present disclosure provides an electrolyte additive. The electrolyte additive comprises: maleimide derivative, bis-maleimide derivative, or combinations there of The structural formulas of maleimide derivative and bis-maleimide derivative respectively are: wherein, R, Rare selected from hydrogen atom and halogen atoms, Ris selected from silicon containing group, nitrogen containing group, fluorine containing group, phosphorus containing group, and a repeating ethoxy group. The present disclosure also provides an electrolyte liquid and a lithium ion battery using the electrolyte additive.

Electrolyte additive, electrolyte and lithium ion battery using the same

A method for making a cathode active material of a lithium ion battery is disclosed. In the method, LiMPOparticles and LiNPOparticles are provided. The LiMPOparticles and LiNPOparticles both are olivine type crystals belonged to a pnma space group of an orthorhombic crystal system, wherein M represents Fe, Mn, Co, or Ni, N represents a metal element having a +2 valence, and N is different from M. The LiMPOparticles and the LiNPOparticles are mixed together to form a precursor. The precursor is calcined to form LiMNPOparticles, wherein 0&#x3c;x&#x3c;1.

Method for making cathode active material of lithium ion battery

In a method for making an anion electrolyte membrane, an inorganic nano-powder is uniformly dispersed in an organic solvent to form a mixture. A fluorinated poly(aryl ether) ionomer is dissolved in the mixture to form a first solution. An active component is further dissolved in the first solution to form a second solution. A crosslinking catalyst is added to the second solution to form a membrane casting solution. The membrane casting solution is coated on a substrate to form a membrane, and the coated substrate is heated. Then, the membrane is peeled from the substrate.

Method for making anion electrolyte membrane

In a method for making anion electrolyte membrane a fluorinated poly(aryl ether) ionomer is dissolved in a solvent to form a ionomer solution. A crosslink component is added to the ionomer solution, to achieve a transparent solution. An inorganic component precursor and water are introduced to the transparent solution, to form a sol-gel mixture. A crosslink catalyst is mixed with the sol-gel mixture to form a membrane casting solution. The membrane casting solution is coated on a substrate to form a membrane, and heated. The membrane is removed from the substrate.

A method for making lithium iron phosphate is provided. In the method, an alkali is reacted with a ferric salt in water to form a red colored ferric hydroxide precipitate in the water. The red colored ferric hydroxide precipitate is mixed with deionized water, organic solvent, and emulsifier to form an water-in-oil emulsion. The phosphoric acid solution and iron metal powder are added to the water-in-oil emulsion to form ferrous hydrogen phosphate. A lithium source is introduced to the water-in-oil emulsion and reacted with the ferrous hydrogen phosphate to form a precursor in the water-in-oil emulsion. The precursor is heated in a protective gas at a heating temperature in a range from about 600&#xb0; C. to about 800&#xb0; C. to form lithium iron phosphate.

Method for making lithium iron phosphate cathode material

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Beijing, China

Yao-Wu Wang