Constructing three-dimensional GO/CNT@NMP aerogels towards primary lithium metal batteries

IF 4.5 3区材料科学 Q2 MATERIALS SCIENCE, MULTIDISCIPLINARY

2D Materials Pub Date : 2024-09-18 DOI:10.1088/2053-1583/ad6884

Xuesong Yang, Yuao Wang, Zhuo Li, Zhuoying Cheng, Yinyi Gao, Kai Zhu and Dianxue Cao

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Abstract

Graphene oxide (GO) can serve as cathode material for a viable primary lithium metal battery due to its richness in oxygen-containing functional groups. However, its application is hindered by non-conductivity of GO. Herein, a proposed electrode structure design strategy is carried to regulate the electron and ion conductivity of the graphene oxide aerogel (GO/CNT@NMP) electrode while retaining the original energy density. GO/CNT@NMP exhibits a discharge specific capacity of 703 mAh g−1 and an ultra-high energy density of 1655.76 Wh kg−1 at a low rate of 0.02 A g−1. Additionally, it achieves a maximum discharge rate of 1.4 A g−1, five times higher than the initial maximum discharge rate of GO. Characterization and electrochemical tests reveal that the excellent performance of GO/CNT@NMP can be attributed to its porous structure, high electrical conductivity, and large layer spacing. This study presents a potent strategy for the advancement of ultra-fast primary batteries, aiming to integrate ultra-high energy density and high-rate discharge capabilities.

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构建三维 GO/CNT@NMP 气凝胶，实现一次锂金属电池

氧化石墨烯（GO）含有丰富的含氧官能团，可作为可行的一次锂金属电池的阴极材料。然而，GO 的非导电性阻碍了它的应用。本文提出了一种电极结构设计策略，以调节氧化石墨烯气凝胶（GO/CNT@NMP）电极的电子和离子导电性，同时保持原有的能量密度。在 0.02 A g-1 的低速率下，GO/CNT@NMP 显示出 703 mAh g-1 的放电比容量和 1655.76 Wh kg-1 的超高能量密度。此外，它还实现了 1.4 A g-1 的最大放电速率，是 GO 初始最大放电速率的五倍。表征和电化学测试表明，GO/CNT@NMP 的优异性能可归因于其多孔结构、高导电性和大层间距。这项研究为超快一次电池的发展提供了一种有效的策略，旨在将超高能量密度和高速放电能力结合起来。

本文章由计算机程序翻译，如有差异，请以英文原文为准。

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来源期刊

2D Materials MATERIALS SCIENCE, MULTIDISCIPLINARY-

CiteScore

10.70

自引率

5.50%

发文量

138

审稿时长

1.5 months

期刊介绍： 2D Materials is a multidisciplinary, electronic-only journal devoted to publishing fundamental and applied research of the highest quality and impact covering all aspects of graphene and related two-dimensional materials.