Issue 6, 2025

Ultrahigh mass loading, binder-free synthetic approach for mesoporous graphitic carbon in 3D current collector for high energy lithium-ion batteries

Abstract

To achieve high-energy lithium-ion batteries (LIBs), both a high mass loading of electrode material onto the current collector and a binder-free process are simultaneously needed, but this remains a challenge. In this study, a novel method is introduced for the binder-free high mass loading of mesoporous graphitic carbon (m-G) onto a 3D current collector. Specifically, polystyrene-block-poly(2-vinylpyridine) copolymer (PS-b-P2VP) is used as both the carbon source and the template for the mesoporous structure. The m-G is successfully synthesized on 3D copper foam (3D Cu) without using a binder by first loading the PS-b-P2VP onto the 3D Cu and subsequently converting it into m-G. Furthermore, in contrast to the delamination-prone traditional slurry coating method, an ultra-high areal mass loading (32 mg cm−2) of m-G is achieved without any delamination from the 3D Cu by simply increasing the feeding amount of PS-b-P2VP. When half-cell LIBs were fabricated using the obtained electrode as the anode, an outstanding energy storage performance was achieved, including a high areal capacity of 5.5 mA h cm−2 at a current density of 3.5 mA cm−2, an excellent rate capability, and good cycle stability (>500 cycles).

Graphical abstract: Ultrahigh mass loading, binder-free synthetic approach for mesoporous graphitic carbon in 3D current collector for high energy lithium-ion batteries

Supplementary files

Article information

Article type
Paper
Submitted
22 Oct 2024
Accepted
07 Jan 2025
First published
07 Jan 2025

J. Mater. Chem. A, 2025,13, 4521-4529

Ultrahigh mass loading, binder-free synthetic approach for mesoporous graphitic carbon in 3D current collector for high energy lithium-ion batteries

J. Kim, K. Kim, H. Yoon, S. Park, D. Woo, H. Jo, C. Jo and J. K. Kim, J. Mater. Chem. A, 2025, 13, 4521 DOI: 10.1039/D4TA07514E

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