The use of an oxidized carbon nanotube film to control Zn deposition and eliminate dendrite formation in a Zn ion battery

IF 5.7 3区材料科学 Q2 Materials Science

New Carbon Materials Pub Date : 2025-02-01 DOI:10.1016/S1872-5805(25)60950-4

Pin-xiang LI , Zhe-han YI , Ye-xing WANG , Chang HE , Ji LIANG , Feng HOU

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Abstract

Aqueous zinc ion batteries are regarded as one of the most promising candidates for large-scale energy storage due to their high safety, cost-effectiveness, and environmental friendliness. However, uncontrolled zinc dendrite growth and side reactions of the zinc anode decrease the stability of Zn batteries. We report the synthesis of an air-oxidized carbon nanotube (O-CNT) film by chemical vapor deposition followed by heat treatment in air which is used as a protective layer on the Zn foil to suppress zinc dendrite growth. The increase in the hydrophilicity of the O-CNT film caused by air oxidation facilitates zinc deposition between the film and the anode instead of deposition on the film surface. The porous structure of the O-CNT film homogenizes the Zn²⁺ ion flux and the electric field on the surface of the Zn foil, leading to the uniform deposition of Zn. As a result, a O-CNT@Zn symmetric cell has a much better cycling stability with a life of more than 3000 h at 1 mA cm⁻² with a capacity of 1 mAh cm⁻², and values of more than 2000 h and 1 mAh cm⁻² at 5 mA cm⁻². In addition, a O-CNT@Zn || Mn²⁺ inserted hydrated vanadium pentoxide (MnVOH) full cell has a better rate performance than a Zn || MnVOH cell, achieving a high discharge capacity of 194 mAh g⁻¹ at a high current density of 8 A g⁻¹. In a long-term cycling test, the O-CNT@Zn || MnVOH full cell has a capacity retention of 58.8% after 2000 cycles at a current density of 5 A·g⁻¹.

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来源期刊

New Carbon Materials MATERIALS SCIENCE, MULTIDISCIPLINARY-

CiteScore

6.10

自引率

8.80%

发文量

3245

审稿时长

5.5 months

期刊介绍： New Carbon Materials is a scholarly journal that publishes original research papers focusing on the physics, chemistry, and technology of organic substances that serve as precursors for creating carbonaceous solids with aromatic or tetrahedral bonding. The scope of materials covered by the journal extends from diamond and graphite to a variety of forms including chars, semicokes, mesophase substances, carbons, carbon fibers, carbynes, fullerenes, and carbon nanotubes. The journal's objective is to showcase the latest research findings and advancements in the areas of formation, structure, properties, behaviors, and technological applications of carbon materials. Additionally, the journal includes papers on the secondary production of new carbon and composite materials, such as carbon-carbon composites, derived from the aforementioned carbons. Research papers on organic substances will be considered for publication only if they have a direct relevance to the resulting carbon materials.