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

Nurbol Tolganbek, Almagul Mentbayeva, Nurassyl Serik, Nursaule Batyrgali, Miras Naizakarayev, Kiyoshi Kanamura, Zhumabay Bakenov

Research output: Contribution to journalArticlepeer-review

Abstract

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.

Original languageEnglish
Article number229686
JournalJournal of Power Sources
Volume493
DOIs
Publication statusPublished - May 1 2021

Keywords

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

ASJC Scopus subject areas

  • Renewable Energy, Sustainability and the Environment
  • Energy Engineering and Power Technology
  • Physical and Theoretical Chemistry
  • Electrical and Electronic Engineering

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