摘要
Succinonitrile(SN)based solid-state electrolytes(SSEs)have potential applications in lithium(Li)batteries due to their ease of preparation and high ionic conductivity at room temperature.Here,a novel SSE consisting of poly(vinylidene fluoride-hexafluoropropy-lene)(PVDF-HFP),poly(methyl methacrylate)(PMMA)and Li_(1.3)Al_(0.3)Ti_(1.7)(PO_(4))_(3) with SN is fabricated,where PMMA is added to serve as a polymer matrix for better wettability of SN.Due to the addition of PMMA,improved room-temperature ionic conductivity of the SSE is resulted.More importantly,better interfacial contact as well as more stable solid-state electrolyte(SEI)layer between SSE and Li anode can be also obtained.As a result,homogeneous and dendrite-free Li plating can be achieved for over 1000 h in Li symmetric cells.When coupled with LiNi_(0.5)Mn_(0.3)Co_(0.2)O_(2) cathode and Li anode,the proposed SSE delivers excellent cycling stability and rate capability in full-cells.By implementing SSEs with a polymeric wetting agent,this work provides fresh perspectives on stabilizing the interface between SSEs and Li metal anodes.
基金
financially supported by National Key R&D Program of China(No.2016YFB0700600)
Soft Science Research Project of Guangdong Province(No.2017B030301013)。
