Glucose-derived hard carbon/carbon nanotube neural network architectures for enhanced sodium ion storage

IF 5.5 3区材料科学 Q2 CHEMISTRY, MULTIDISCIPLINARY

Carbon Letters Pub Date : 2024-09-28 DOI:10.1007/s42823-024-00815-0

Yingbo Kang, Yinglong Weng, Xiaotong Han, Jianping Zhang, Xu Yu, Bo Wang

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Abstract

Developing advanced anode materials is one of the effective strategies to enhance the electrochemical performance of sodium-ion batteries (SIBs). Herein, inspired by the biological central nervous system structure, we report a facile and efficient strategy to fabricate the three-dimensional hierarchical neural network-like carbon architectures, where the glucose-derived hard carbon (HC) nanospheres are in situ assembled and embedded in carbon nanotube (CNT) network nanostructure (HC/CNT hybrid networks). The HC nanospheres with large carbon interlayer spacing help to decrease the diffusion length of sodium ions and the interconnected CNT networks enable the rapid electron transfer during charge/discharge process. Benefiting from these structure merits, the as-made HC/CNT hybrid networks can deliver a superior rate capacity of 162 mA h g⁻¹ at the current density of 5 A g⁻¹. Additionally, it exhibits excellent cycling performance with a capacity retention rate of 86.3% after 140 cycles. This work offers a promising candidate anode material for SIBs and a new prospect towards carbon-based composites design, simultaneously.

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用于增强钠离子存储的葡萄糖衍生硬碳/碳纳米管神经网络架构

开发先进的负极材料是提高钠离子电池电化学性能的有效策略之一。在此，受生物中枢神经系统结构的启发，我们报告了一种简单有效的制造三维分层神经网络样碳结构的策略，其中葡萄糖衍生的硬碳（HC）纳米球被原位组装并嵌入碳纳米管（CNT）网络纳米结构（HC/CNT混合网络）。具有大碳层间距的HC纳米球有助于减少钠离子的扩散长度，并且相互连接的碳纳米管网络能够在充放电过程中实现快速的电子转移。得益于这些结构优点，现有的HC/CNT混合网络可以在电流密度为5 a g−1时提供162 mA h g−1的优越速率容量。此外，它具有优异的循环性能，在140次循环后，容量保留率为86.3%。这项工作为sib提供了一种有前途的候选阳极材料，同时也为碳基复合材料的设计提供了新的前景。

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来源期刊

Carbon Letters CHEMISTRY, MULTIDISCIPLINARY-MATERIALS SCIENCE, MULTIDISCIPLINARY

CiteScore

7.30

自引率

20.00%

发文量

118

期刊介绍： Carbon Letters aims to be a comprehensive journal with complete coverage of carbon materials and carbon-rich molecules. These materials range from, but are not limited to, diamond and graphite through chars, semicokes, mesophase substances, carbon fibers, carbon nanotubes, graphenes, carbon blacks, activated carbons, pyrolytic carbons, glass-like carbons, etc. Papers on the secondary production of new carbon and composite materials from the above mentioned various carbons are within the scope of the journal. Papers on organic substances, including coals, will be considered only if the research has close relation to the resulting carbon materials. Carbon Letters also seeks to keep abreast of new developments in their specialist fields and to unite in finding alternative energy solutions to current issues such as the greenhouse effect and the depletion of the ozone layer. The renewable energy basics, energy storage and conversion, solar energy, wind energy, water energy, nuclear energy, biomass energy, hydrogen production technology, and other clean energy technologies are also within the scope of the journal. Carbon Letters invites original reports of fundamental research in all branches of the theory and practice of carbon science and technology.