锰源对钠离子电池p2相锰基正极材料性能的影响

IF 5.3 3区材料科学 Q2 MATERIALS SCIENCE, MULTIDISCIPLINARY

Materials Research Bulletin Pub Date : 2025-04-29 DOI:10.1016/j.materresbull.2025.113531

Peng Yu , Qianbi Chen , Yifan Song , Chun Zhang , Wei Huang , Hui Liu , Fanbo Meng , Zhiguo Wang

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引用次数: 0

摘要

p2相锰基氧化物具有成本低、离子扩散速度快、可逆容量高等优点，被认为是钠离子电池最理想的正极材料之一。然而，锰源对正极材料结构和电化学性能的影响一直被忽视。本文选择了两种不同价态的锰源Mn2O3和MnO2，合成了P2-Na0.7MnO2正极材料。用Mn2O3合成的P2-Na0.7MnO2正极材料表现出较好的电化学性能，在2.0 ~ 4.5 V电压范围内，0.1 C速率下放电比容量可达149.2 mAh g-1。阴极材料表现出较好的电化学动力学性能，Na+离子扩散速率为1.7 × 10-10 cm2 s-1，充放电过程中无明显的相变反应。锰源对钠离子电池p2相锰基正极材料的性能起着重要作用。

本文章由计算机程序翻译，如有差异，请以英文原文为准。

Effect of manganese source on the performance of P2-phase manganese-based cathode materials for sodium-ion batteries

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Effect of manganese source on the performance of P2-phase manganese-based cathode materials for sodium-ion batteries

P2-phase manganese-based oxide is considered to be one of the most ideal cathode materials for sodium-ion batteries due to its low cost, fast ion diffusion rate and high reversible capacity. However, the influence of manganese sources on the structural and electrochemical properties of cathode materials has been always ignored. Here, two types of manganese sources with different valence states, including Mn₂O₃ and MnO₂, are selected to synthesize P2-Na_0.7MnO₂ cathode materials. The P2-Na_0.7MnO₂ cathode materials synthesized with Mn₂O₃ shows better electrochemical performance, and can deliver a discharge specific capacity of 149.2 mAh g^-1 at 0.1 C rate in the voltage range of 2.0∼4.5 V. Moreover, the cathode materials displays better electrochemical kinetics performance with higher Na⁺ ion diffusion rate of 1.7 × 10^–10 cm² s^-1, with no obvious phase transition reaction during charge and discharge processes. Manganese sources play an important role on the performance of P2-phase manganese-based cathode materials for sodium-ion batteries.

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来源期刊

Materials Research Bulletin 工程技术-材料科学：综合

CiteScore

9.80

自引率

5.60%

发文量

372

审稿时长

42 days

期刊介绍： Materials Research Bulletin is an international journal reporting high-impact research on processing-structure-property relationships in functional materials and nanomaterials with interesting electronic, magnetic, optical, thermal, mechanical or catalytic properties. Papers purely on thermodynamics or theoretical calculations (e.g., density functional theory) do not fall within the scope of the journal unless they also demonstrate a clear link to physical properties. Topics covered include functional materials (e.g., dielectrics, pyroelectrics, piezoelectrics, ferroelectrics, relaxors, thermoelectrics, etc.); electrochemistry and solid-state ionics (e.g., photovoltaics, batteries, sensors, and fuel cells); nanomaterials, graphene, and nanocomposites; luminescence and photocatalysis; crystal-structure and defect-structure analysis; novel electronics; non-crystalline solids; flexible electronics; protein-material interactions; and polymeric ion-exchange membranes.