Engineering and construction of multi-functional Janus separator for high-stability Li-CO2 battery

Hangyu Li; Yang Gu; Xiaoyuan Zeng; Kai Ding; Haotian Tan; Peng Dong; Yanjia Zhang; Jie Xiao

doi:10.1016/j.jcis.2024.12.164

Engineering and construction of multi-functional Janus separator for high-stability Li-CO₂ battery

J Colloid Interface Sci. 2024 Dec 24;683(Pt 2):335-346. doi: 10.1016/j.jcis.2024.12.164. Online ahead of print.

Authors

Hangyu Li¹, Yang Gu², Xiaoyuan Zeng³, Kai Ding², Haotian Tan², Peng Dong⁴, Yanjia Zhang⁵, Jie Xiao⁶

Affiliations

¹ National and Local Joint Engineering Research Center for Lithium-ion Batteries and Materials Preparation Technology, Key Laboratory of Advanced Battery Materials of Yunnan Province, Faculty of Metallurgical and Energy Engineering, Kunming University of Science and Technology, Kunming 650093, China; School of Materials and Chemistry, University of Shanghai for Science and Technology, Shanghai 200093, China.
² National and Local Joint Engineering Research Center for Lithium-ion Batteries and Materials Preparation Technology, Key Laboratory of Advanced Battery Materials of Yunnan Province, Faculty of Metallurgical and Energy Engineering, Kunming University of Science and Technology, Kunming 650093, China.
³ National and Local Joint Engineering Research Center for Lithium-ion Batteries and Materials Preparation Technology, Key Laboratory of Advanced Battery Materials of Yunnan Province, Faculty of Metallurgical and Energy Engineering, Kunming University of Science and Technology, Kunming 650093, China. Electronic address: [email protected].
⁴ National and Local Joint Engineering Research Center for Lithium-ion Batteries and Materials Preparation Technology, Key Laboratory of Advanced Battery Materials of Yunnan Province, Faculty of Metallurgical and Energy Engineering, Kunming University of Science and Technology, Kunming 650093, China. Electronic address: [email protected].
⁵ National and Local Joint Engineering Research Center for Lithium-ion Batteries and Materials Preparation Technology, Key Laboratory of Advanced Battery Materials of Yunnan Province, Faculty of Metallurgical and Energy Engineering, Kunming University of Science and Technology, Kunming 650093, China; Advanced Chemical Energy Research Center, Institute of Advanced Sciences, Yokohama National University, 79-5 Tokiwadai, Hodogaya-ku, Yokohama, Kanagawa 240-8501, Japan.
⁶ National and Local Joint Engineering Research Center for Lithium-ion Batteries and Materials Preparation Technology, Key Laboratory of Advanced Battery Materials of Yunnan Province, Faculty of Metallurgical and Energy Engineering, Kunming University of Science and Technology, Kunming 650093, China. Electronic address: [email protected].

PMID: 39733548
DOI: 10.1016/j.jcis.2024.12.164

Abstract

Due to the high theoretical energy density, lithium-carbon dioxide (Li-CO₂) batteries provide unique advantages when using CO₂ to generate electricity. However, the issues with lithium dendrite generated by uneven deposition and quick cathode passivation continue to impede the development of Li-CO₂ batteries. In this work, a Janus separator with dual functionalities is created using an in-situ growth and hydrothermal technique. It can be used to expand the cathode to alleviate the quick passivation of the cathode, in addition to inhibiting the growth of lithium dendrite. On the one hand, as an ion transport framework, Prussian blue (PB) nanocubes formed in-situ on the anode side can control the uniform transport of Li-ions and prevent the proliferation of lithium dendrites. The Prussian blue and reduced graphene oxide composite material (PB-rGO) on the cathode side, on the other hand, can be employed as an extension of the cathode, which not only contains more discharge products but also encourages their decomposition, playing a self-cleaning role. Moreover, the Li||Li symmetrical battery with Janus separator exhibits a steady cycle life of more than 1700 h. Also, when applied to a Li-CO₂ battery, it demonstrates an extremely high discharge capacity of 12100 mAh g^-1 and an exceptionally long cycle life of 3144 h.

Keywords: Cathodic passivation; Dendrite; Janus separator; Li-CO(2) battery; Prussian blue.