Details

Autor(en) / Beteiligte

• Yu, Le
• Liu, Qing
• Wang, Libin
• Guo, Songtao
• Hu, Qiaomei
• Li, Yaqian
• Lan, Xiwei
• Liu, Zhifang
• Hu, Xianluo

Titel

Boosting lithium batteries under harsh operating conditions by a resilient ionogel with liquid-like ionic conductivity

Ist Teil von

• Journal of energy chemistry, 2021-11, Vol.62, p.408-414

Ort / Verlag

Elsevier B.V

Erscheinungsjahr

2021

Link zum Volltext

Quelle

Alma/SFX Local Collection

Beschreibungen/Notizen

• This study underlines a facile soft-chemistry route to prepare a hierarchically architected ionogel (HAIG) electrolyte with liquid-like ionic conductivity and good mechanical resilience, which can serve as a key component to boost lithium batteries under harsh operating conditions. [Display omitted] New chemistries are being developed to increase the capacity and power of rechargeable batteries. However, the risk of safety issues increases when high-energy batteries using highly active materials encounter harsh operating conditions. Here we report on the synthesis of a unique ionogel electrolyte for abuse-tolerant lithium batteries. A hierarchically architected silica/polymer scaffold is designed and fabricated through a facile soft chemistry route, which is competent to confine ionic liquids with superior uptake ability (92.4 wt%). The monolithic ionogel exhibits high conductivity and thermal/mechanical stability, featuring high-temperature elastic modulus and dendrite-free lithium cycling. The Li/LiFePO4 pouch cells achieve outstanding cyclability at different temperatures up to 150 °C, and can sustain cutting, crumpling, and even coupled thermal–mechanical abuses. Moreover, the solid-state lithium batteries with LiNi0.60Co0.20Mn0.20O2, LiNi0.80Co0.15Al0.05O2, and Li1.2Mn0.54Ni0.13Co0.13O2 cathodes demonstrate excellent cycle performances at 60 °C. These results indicate that the resilient and high-conductivity ionogel electrolyte is promising to realize high-performance lithium batteries with high energy density and safety.