One of the research progress of composite solid electrolytes: LLZO/block polymer composite Xie Haiming and others from Northeast Normal University designed and synthesized a composite five-block polymer solid electrolyte (PBCP@LLZTO_30), which combines Li6.4La3Zr1.4Ta0.

2024/06/1102:36:32 science 1785

One of the research progress of composite solid electrolytes: LLZO/block polymer composite

Northeast Normal University Xie Haiming et al. designed and synthesized a composite five-block polymer solid electrolyte (PBCP@LLZTO_30), which combines Li6.4La3Zr1.4Ta0. 6O12(LLZTO) nanoparticles incorporated into polystyrene -poly(ethylene oxide)-poly( propylene oxide )-poly(ethylene oxide)-polystyrene (PS-PEO-PPO-PEO -PS) pentablock copolymer matrix. The addition of LLZTO improves the ion conductivity of CSE by reducing the crystallinity of PS-PEO-PPO-PEO-PS, and also provides an additional transmission channel for lithium ions . The results show that the composite solid electrolyte displays an ionic conductivity of 3.10 × 10-4S cm-1 (28 °C), a lithium ion migration number of 0.36, and an electrochemical stability window of up to 5.1 V.

At 28°C, the LFP//Li batteries assembled from PBCP@LLZTO_30 all showed a high discharge specific capacity of 161 mA h g-1, which is comparable to liquid batteries. At 28 °C, after 160 charge and discharge cycles, the capacity retention rate can reach 95.7%. iron lithium battery shows excellent rate performance. When the rate is increased to 1 C, the capacity can reach 83 mA h g-1. After returning to 0.1 C again, the capacity can still be restored to 160 mA h g-1. (Li6.4La3Zr1.4Ta0.6O12 Reinforced Polystyrene-Poly(ethylene oxide)-Poly(propylene oxide)-Poly(ethylene oxide)-Polystyrene Pentablock Copolymer-Based Composite Solid Electrolytes for Solid-State Lithium Metal Batteries, Journal of Power Sources, 2022,542,231797)

Zhang Xiaorong

Zhang Xiaorong, quasi-doctoral candidate. Affiliated to the National and Local Joint Engineering Laboratory for Power Batteries of Northeast Normal University, it is mainly engaged in the research of lithium-ion batteries and solid-state lithium batteries. From 2019 to present, he has been engaged in lithium battery-related research in Xie Haiming’s research group at Northeast Normal University. Representative papers: 1. Penta-block composite electrolyte (Journal of Power Sources542 (2022): 231797).

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