High‐performance solid PEO/PPC/LLTO‐nanowires polymer composite electrolyte for solid‐state lithium battery. (2nd June 2019)

• Record Type: Journal Article
• Authors: Zhu, Lin; Zhu, Penghui; Yao, Shanshan; Shen, Xiangqian; Tu, Feiyue
• Is Part Of: International journal of energy research. Volume 43:Number 9(2019)
• Page Start: 4854
• Page End: 4866
• Publication Date: 2019-06-02
• Subjects: LLTO nanowires -- poly (ethylene oxide) (PEO) -- poly (propylene carbonate) (PPC) -- solid polymer composite electrolytes -- solid‐state lithium battery; Power resources -- Periodicals; Power (Mechanics) -- Periodicals; Power resources -- Research -- Periodicals; 621.042
• DOI: 10.1002/er.4638
• Languages: English
• ISSNs: 0363-907X

Abstract

SUMMARY: Solid polymer composite electrolyte (SPCE) with good safety, easy processability, and high ionic conductivity was a promising solution to achieve the development of advanced solid‐state lithium battery. Herein, through electrospinning and subsequent calcination, the Li0.33 La0.557 TiO3 nanowires (LLTO‐NWs) with high ionic conductivity were synthesized. They were utilized to prepare polymer composite electrolytes which were composed of poly (ethylene oxide) (PEO), poly (propylene carbonate) (PPC), lithium bis (fluorosulfonyl)imide (LiTFSI), and LLTO‐NWs. Their structures, thermal properties, ionic conductivities, ion transference number, electrochemical stability window, as well as their compatibility with lithium metal, were studied. The results displayed that the maximum ionic conductivities of SPCE containing 8 wt.% LLTO‐NWs were 5.66 × 10 −5 S cm −1 and 4.72 × 10 −4 S cm −1 at room temperature and 60°C, respectively. The solid‐state LiFePO4 /Li cells assembled with this novel SPCE exhibited an initial reversible discharge capacity of 135 mAh g −1 and good cycling stability at a charge/discharge current density of 0.5 C at 60°C. Abstract : The Li0.33 La0.557 TiO3 (LLTO) nanowires with high ionic conductivity were prepared through electrospinning and subsequent high temperature calcinations. It was filled in the blend of poly (ethylene oxide) (PEO) and poly (propylene carbonate) (PPC) as a filler and the novel solid PEO/PPC/LLTO‐nanowires polymer composite electrolytes were prepared via solution casting method with low cost.