材料科学
电解质
阳极
电化学
锂(药物)
化学工程
复合数
阴极
离子电导率
电导率
复合材料
电极
物理化学
化学
医学
工程类
内分泌学
作者
Jihwan Kim,Jiwon Sun,Jae‐Sung Jang,Deok‐Hye Park,Soyeon Ahn,Won-Chan Kim,Kyoungmin Min,Kyung‐Won Park
标识
DOI:10.1016/j.ensm.2023.103080
摘要
All-solid-state lithium batteries (ASSLBs) with hybrid solid electrolytes (HSEs) fabricated using composite structures consisting of polymers and oxides have received extensive attentions owing to their high energy densities and excellent stabilities. Herein, for the high-performance ASSLBs, we designed a double-layered hybrid solid electrolyte (DLHSE) containing 15 wt% LiTa2PO8 (LTPO) and 10 wt% Li6.28Al0.24La3Zr2O12 (LALZO) heterogeneous active fillers in a poly(vinylidene fluoride-co-hexafluoropropylene) (PVDF-HFP) matrix (LTPO 15% HSE and LALZO 10% HSE, respectively) via two-step casting method. For application in high-performance ASSLBs, LTPO 15% and LALZO 10% HSEs were contacted with cathode and lithium metal anode, respectively. Additionally, DLHSE demonstrated a high ionic conductivity of 8.7 × 10−4 S cm−1 at 25 °C, electrochemical oxidative stability (∼5.1 V) at 55 °C, and a high critical current density of >1.0 mA cm−2, resulting from its low interfacial resistance and high-density interior structure. ASSLB consisting of LiFePO4 (LFP), DLHSE, and lithium metal anode (LFP/DLHSE/Li) demonstrated an initial specific capacity of ∼151 mAh g−1 at 0.2 C and 25 °C and a specific capacity retention of 91% after 140 cycles of charge/discharge. Moreover, Li2MnO3/DLHSE/Li ASSLB demonstrated relatively stable cycling performance up to ∼4.4 V at 20 mA g−1 and 25 °C for 400 cycles of charge/discharge.
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