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Updated: Oct 25, 2026

In Situ Neutron Powder Diffraction Using Custom-made Lithium-ion Batteries
Published on: November 10, 2014
Breaking Ionic Stagnation Zones for Ultrafast Charging in Low-Concentration Lithium-Ion Batteries
Rui Cao1, Haipeng You2, Zhanxuan Zhang1
1Key Laboratory for Ultrafine Materials of Ministry of Education, School of Chemical Engineering, East China University of Science and Technology, Shanghai200237, China.
Abstract:
Low-concentration electrolytes (LCEs) offer significant cost benefits for lithium-ion batteries (LIBs), but struggle with fast-charging demands due to sluggish Li+ transport, high desolvation barriers, and unstable interphase chemistry. Herein, we leveraged low-ionophilic solvents to form a high ionic-conductivity LCE, which enables rapid intersolvation cluster hopping networks, thus overcoming ionic stagnation zones. Our formulated electrolyte delivers an ionic conductivity of 9.2 mS cm-1, accelerates Li+ desolvation, and promotes anion-derived inorganic-rich interphases. As a result, graphite anodes achieve a high reversible capacity of 306.4 mAh g-1 at 5 C (81.5% of its capacity at 0.3 C) and deliver 332.4 mAh g-1 at -20 °C, retaining 88.9% of its room-temperature capacity. In 1 Ah graphite||LiNi0.8Co0.1Mn0.1O2 (NMC811) pouch cells, this electrolyte supports 76.6% capacity at 5 C, 84.1% retention over 1000 cycles at 0.5 C, and 82.0% retention after 100 cycles at 3 C, demonstrating the practical promise of LCEs for fast-charging LIBs.
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