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Updated: May 23, 2025

In Situ Neutron Powder Diffraction Using Custom-made Lithium-ion Batteries
Published on: November 10, 2014
Practical 4.7 V solid-state 18650 cylindrical lithium metal batteries with in-situ fabricated localized
Xingchen Song1,2, Ruiqi Zhao1,2, Jie Zhu1,2
1The Centre of Nanoscale Science and Technology and Key Laboratory of Functional Polymer Materials, Institute of Polymer Chemistry, College of Chemistry, Nankai University, Tianjin 300071, China.
Abstract:
In-situ fabricated gel polymer electrolytes (GPEs), characterized with superior interfacial properties and large-scale processibility, represent a promising electrolyte system for high-performance lithium metal batteries (LMBs). Herein, we propose an in-situ fabricated high-voltage GPE featuring a localized high-concentration solvation structure (LHCE-GPE). This tailored special solvation structure within a polymer matrix promotes the formation of an electrochemically robust electrode-electrolyte interphase. Furthermore, employing LHCE-GPE, Li||Li1.2Ni0.13Co0.13Mn0.54O2 cells operating at 4.8 V demonstrate a high specific capacity of 248 mAh g-1, and 4.5 V Li||LiNi0.8Co0.1Mn0.1O2 cells achieve a remarkable cycling stability over 1000 cycles. Significantly, our LHCE-GPE allows for the operation of practical solid-state 18650 cylindrical LMBs at 4.7 V and industrial Li-ion batteries at 4.6 V, achieving high energy densities of 250 and 283 Wh kg-1, respectively (excluding packaging), while also demonstrating robust safety during rigorous nail-penetration tests. Our LHCE-GPE design presents a practical and powerful strategy for realizing solid-state LMBs with high energy density and high safety.
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