Cr-Doped Fe_{1–x}Cr_{x}F₃·0.33H₂O Nanomaterials as Cathode Materials for Sodium-Ion Batteries

Chao Zhang; Mingxia Yan; Wenting Li; Ce Han; Jie Li; He Zhao; Guixiao Jia; Shengli An; Xinping Qiu

doi:10.1021/acsami.1c13462

journal article·2021-10-20

Cr-Doped Fe_1–xCr_xF₃·0.33H₂O Nanomaterials as Cathode Materials for Sodium-Ion Batteries

Chao Zhang, Mingxia Yan, Wenting Li, Ce Han, Jie Li, He Zhao, Guixiao Jia, Shengli An, Xinping Qiu

ACS Applied Materials & Interfaces· Volume 13· Issue 41

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Source abstract

Abstract

Due to the high theoretical specific capacity and low cost, FeF3·0.33H2O has become one of the potential choices of cathode materials for sodium-ion batteries. However, the poor intrinsic conductivity limits its practical applications. Herein, the atomic substitution is used to improve its intrinsic conductivity. The first-principles calculation results show that Cr3+ doping can reduce the band gap of FeF3·0.33H2O to improve its intrinsic conductivity. The discharge specific capacity of Fe0.95Cr0.05F3·0.33H2O with a narrowest band gap is 194.02 mA h/g at 0.1 C within the range of 1.4–4.0 V, which is higher than that of FeF3·0.33H2O (136.47 mA h/g). Using the electrochemical impedance spectroscopy and galvanostatic intermittent titration technique tests, it is found that Rct of Fe0.95Cr0.05F3·0.33H2O is reduced and DNa+ is almost unchanged, as compared to FeF3·0.33H2O.

Source: openalex_inverted_index · Quality: baseline

Research context

Energy storage Nanomaterials

OpenAlex topics: Advancements in Battery Materials · Magnetic Properties and Synthesis of Ferrites · Advanced Battery Materials and Technologies

SciVX discovery tags are terminology-based. OpenAlex topics are source-provided classifications.

Affiliations

School of Metallurgical and Ecological Engineering, University of Science and Technology Beijing, Beijing 100083, China

Key Laboratory of Organic Optoelectronics and Molecular Engineering, Department of Chemistry, Tsinghua University, Beijing 100084, China

School of Materials and Metallurgy, Inner Mongolia University of Science and Technology, Baotou 014010, China

Funding

Ministry of Science and Technology of the People's Republic of China

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