Design and preparation of thin film gel polymer electrolyte for 3D Li-ion battery

Tolganbek N. Mentbayeva A. Serik N. Batyrgali N. Naizakarayev M. Kanamura K. Bakenov Z.
1 May 2021 Elsevier B.V.

Journal of Power Sources
2021 #493

Three-dimensional (3D) configuration of the battery provides a large active surface area of the electrodes to store and utilize more active material, enabling remarkable increase of capacity. Herein, we report on the development of a full 3D battery composed of Ni₃Sn₄ (Ni–Sn) alloy electrodeposited onto a nickel foam current collector to form a 3D anode, which was coated with a polymer electrolyte-separator film, and LiFePO₄/CNT cathode filled into the voids of the resulting 3D structure. An ultrathin polymer coating on the 3D anode was obtained via layer-by-layer technique. The X-ray diffraction investigations confirmed stability of the structure of the anode prior and after the polymer coating, while top and cross-section SEM images proved the uniformity of both the deposited 3D anode and the polymer coating on its surface. It was shown that a thin homogeneous layer of polymer can be obtained on 3D structured anode. This film effectively performed as a gel-like electrolyte in a full 3D battery. Cyclic voltammetry and charge-discharge tests exhibited stable electrochemical response and cyclability of the 3D battery. The prepared full 3D battery successfully operated at 0.1C rate and retained 90% of its initial capacity over 100 galvanostatic charge-discharge cycles.

3D battery , Anode , Gel electrolyte , Layer-by-layer assembly (LbL) , Lithium-ion battery (LIB) , Ni–Sn alloy

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Department of Chemical and Materials Engineering, Nazarbayev University, Nur-Sultan, Kazakhstan
National Laboratory Astana, Nazarbayev University, Nur-Sultan, Kazakhstan
Graduate School of Urban Environmental Sciences, Tokyo Metropolitan University, Tokyo, Japan

Department of Chemical and Materials Engineering
National Laboratory Astana
Graduate School of Urban Environmental Sciences

10 лет помогаем публиковать статьи Международный издатель

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