journal article·2025-01-17

One-Step Pre-Sodiation and Dehydration of Prussian Blue Analog Nanostructures via Sodium Benzophenone for Sodium-Ion Batteries

Jiafan Zheng, Jun Zheng, Gang Wang, Chengyu Zhang, Wenwu Fu, Yanmei Zhao, Zhilu Yang, Jieyuan Wang, Junwei Li, Fu Cai, Wenbo Huang, Ming Zhang, Zhongrong Shen

ACS Applied Nano Materials· Volume 8· Issue 2
Publisher page

Abstract

Prussian blue analogs (PBAs) face two major challenges in sodium-ion batteries: sodium content that falls below the theoretical value and the difficulty of dehydrating the crystal water in their applications. This study proposes a one-step presodiation and dehydration strategy for PBA nanostructures, resulting in a PBA electrode (H-PB) with both low water content and high sodium content through the use of sodium benzophenone. This strategy minimizes water reabsorption during electrode preparation and eliminates the need for secondary drying. The H-PB half-cell achieves an initial Coulombic efficiency of 98.4% at a current density of 0.2 C, a significant improvement over the 30.0% efficiency observed for the high water and low sodium content PBA electrode (L-PB). Additionally, when paired with commercial hard carbon, the H-PB electrode demonstrated a capacity retention of 70.0% after 100 cycles at 1 C. This study provides a straightforward method for one-step presodiation and dehydration of PBAs as positive electrodes.
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Research context

OpenAlex topics: Advancements in Battery Materials · Extraction and Separation Processes · Advanced Battery Materials and Technologies

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

Affiliations

CAS Key Laboratory of Design and Assembly of Functional Nanostructures, and Fujian Key Laboratory of Nanomaterials, Fujian Institute of Research on the Structure of Matter, Chinese Academy of Sciences, Fuzhou 350002, China

College of Chemistry and Materials Science, Fujian Normal University, Fuzhou 350007, China

Xiamen Key Laboratory of Rare Earth Photoelectric Functional Materials, Xiamen Institute of Rare Earth Materials, Haixi Institutes, Chinese Academy of Sciences, Xiamen 361021, China

Fujian College, University of Chinese Academy of Sciences, Fuzhou 350007, China

Xiamen 3-Circles Battery Co., Ltd, Xiamen 361023, China

Funding

Natural Science Foundation of Fujian Province · Xiamen Institute of Rare Earth Materials XMIREM autonomously deployment project

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