Research on Impedance Spectroscopy of Manganese Acid Lithium Ion Battery for Energy Storage

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Abstract

For a better application of the manganese acid lithium ion battery in the field of energy storage, it is necessary to master not only output performance but also internal characteristics. A commercial manganese acid lithium ion battery was measured by electrochemical impedance spectrum (EIS) under the state of charge (SOC) ranging from 100% to 0%. By a supposed equivalent circuit and the afterwards fitting, parameters of every element in the circuit that represent Li⁺ intercalation/deintercalation or charge transfer were obtained. As a new battery, the electrochemical reaction resistance is bigger than the ohmic resistance. It increases while SOC gradually lowers. In addition, the diffusion impedance also increases while SOC decreases less than 20%. The capacitive effect caused by electrochemical reactions is weaker than that caused by charge diffusion. However, after 700 cycles at 1 C at 45℃, the electrochemical reaction resistance increases obviously whereas the capacitive effect caused by electrochemical reaction is weakened.

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	Articles by authors
	Gao Fei
	Yang Kai
	Li Dahe
	Liu Hao
	Wang Lina
	Hu Chen

Keywords： energy storage； manganese acid lithium ion battery； impedance spectrum； state of charge

Received 2015-12-01;

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Cite this article:

Gao Fei, Yang Kai, Li Dahe, Liu Hao, Wang Lina, Hu Chen.Research on Impedance Spectroscopy of Manganese Acid Lithium Ion Battery for Energy Storage[J] Chemcial Industry and Engineering, 2016,V33(3): 71-75

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