A dense cellulose-based membrane as a renewable host for gel polymer electrolyte of lithium ion batteries
2014; Elsevier BV; Volume: 476; Linguagem: Inglês
10.1016/j.memsci.2014.10.056
ISSN1873-3123
AutoresM.X. Li, Xiaowei Wang, Yanming Yang, Zheng Chang, Yuping Wu, Rudolf Holze,
Tópico(s)Advanced Battery Technologies Research
ResumoA dense instead of porous gel polymer electrolyte for lithium ion batteries is reported for the first time. Its host is a renewable and environment friendly polymer, hydroxyethyl cellulose (HEC). The preparation of HEC membrane is very simple. The membrane is stable up to 280 °C, much higher than the melting points of those commercial separators based on polyolefin. The evaporation temperature of the organic electrolyte in the prepared gel polymer electrolytes is up to 75 °C. In addition, the gel polymer electrolyte shows good electrochemical performance including high ionic conductivity at room temperature, and a high lithium ion transference number. When tested as separator and electrolyte, a LiFePO4 positive electrode displays satisfactory electrochemical properties including high discharge capacity and stable cycling. These results indicate a very promising direction for a low cost and renewable gel polymer electrolyte for lithium ion batteries.
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