Porous cellulose diacetate-SiO2 composite coating on polyethylene separator for high-performance lithium-ion battery

Chen, WenjuShanghai Univ, Sch Mat Sci & Engn, Shanghai 200444, Peoples R China.;Shanghai Univ, Res Ctr Nanosci & Nanotechnol, Shanghai 200444, Peoples R China. (författare)

The developments of high-performance lithium ion battery are eager to the separators with high ionic conductivity and thermal stability. In this work, a new way to adjust the comprehensive properties of inorganic-organic composite separator was investigated. The cellulose diacetate (CDA)-SiO2 composite coating is beneficial for improving the electrolyte wettability and the thermal stability of separators. Interestingly, the pore structure of composite coating can be regulated by the weight ratio of SiO2 precursor tetraethoxysilane (TEOS) in the coating solution. The electronic performance of lithium ion batteries assembled with modified separators are improved compared with the pristine PE separator. When weight ratio of TEOS in the coating solution was 9.4%, the composite separator shows the best comprehensive performance. Compared with the pristine PE separator, its meltdown temperature and the break-elongation at elevated temperature increased. More importantly, the discharge capacity and the capacity retention improved significantly.

Shi, LiyiShanghai Univ, Res Ctr Nanosci & Nanotechnol, Shanghai 200444, Peoples R China. (författare)
Wang, ZhuyiShanghai Univ, Res Ctr Nanosci & Nanotechnol, Shanghai 200444, Peoples R China. (författare)
Zhu, JiefangUppsala universitet,Strukturkemi(Swepub:uu)zhuji179 (författare)
Yang, HaijunChinese Acad Sci, Shanghai Inst Appl Phys, Shanghai 201800, Peoples R China. (författare)
Mao, XufengShanghai Univ, Res Ctr Nanosci & Nanotechnol, Shanghai 200444, Peoples R China. (författare)
Chi, MingmingShanghai Univ, Res Ctr Nanosci & Nanotechnol, Shanghai 200444, Peoples R China. (författare)
Sun, LiningShanghai Univ, Res Ctr Nanosci & Nanotechnol, Shanghai 200444, Peoples R China. (författare)
Yuan, ShuaiShanghai Univ, Res Ctr Nanosci & Nanotechnol, Shanghai 200444, Peoples R China. (författare)
Shanghai Univ, Sch Mat Sci & Engn, Shanghai 200444, Peoples R China.;Shanghai Univ, Res Ctr Nanosci & Nanotechnol, Shanghai 200444, Peoples R China.Shanghai Univ, Res Ctr Nanosci & Nanotechnol, Shanghai 200444, Peoples R China. (creator_code:org_t)

Av författaren/redakt...: Chen, Wenju; Shi, Liyi; Wang, Zhuyi; Zhu, Jiefang; Yang, Haijun; Mao, Xufeng; visa fler...; Chi, Mingming; Sun, Lining; Yuan, Shuai; visa färre...

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