Scholarlink

<p>Sacrificial sodium-rich salts pre-sodiation is a safe and promising approach to supplement sodium-ion batteries with additional capacity for energy density enhancement. However, high-cost from additional solvent and low-utilization-ratio caused by loose electrical contact limit its practical application in slurry-coated electrodes. Herein, we demonstrate a dry-processing method to enable complete sodium oxalate decomposition and solvent-free production of thick electrodes. Distinct to particle aggregation in slurry-coated electrodes, a homogenous mixture of Na<sub>2</sub>C<sub>2</sub>O<sub>4</sub> and conductive agents is generated and wraps Na<sub>3</sub>V<sub>2</sub>(PO<sub>4</sub>)<sub>3</sub> particles after high-speed shear-mixing and hot-calendaring of dry-processing method, constructing intimate and durable electronic pathways, thus realizing theoretical decomposition capacity of Na<sub>2</sub>C<sub>2</sub>O<sub>4</sub> in thick electrodes (54 mg cm<sup>-2</sup>). This strategy increases the lifespan by 200 cycles and energy density by 82.5% for all-dry-processing sodium-ion batteries with areal capacity of 5.4 mAh cm<sup>-2</sup>, which highlights the vital role of exploiting mechanical and thermal effects of dry-processing method in sustainable fabrication of high-energy sodium-ion batteries.</p>

错误：搜索内容不能为空，请输入英文关键词
错误：关键词超出字数限制，请精简
高级检索

Integrating dry-processing and pre-sodiation enables high-energy sodium ion batteries

  • 期刊论文

  • 出版模式：

    开放获取

  • 发表日期：

    2025年12月13日

查看全文
  • Nan Qin,
  • Yifan Li,
  • Haotian Yang,
  • Jing Chen,
  • Chenchen Feng,
  • Cunman Zhang,
  • Zonghai Chen,
  • Jim P. Zheng,
  • Liming Jin

摘要

Sacrificial sodium-rich salts pre-sodiation is a safe and promising approach to supplement sodium-ion batteries with additional capacity for energy density enhancement. However, high-cost from additional solvent and low-utilization-ratio caused by loose electrical contact limit its practical application in slurry-coated electrodes. Herein, we demonstrate a dry-processing method to enable complete sodium oxalate decomposition and solvent-free production of thick electrodes. Distinct to particle aggregation in slurry-coated electrodes, a homogenous mixture of Na2C2O4 and conductive agents is generated and wraps Na3V2(PO4)3 particles after high-speed shear-mixing and hot-calendaring of dry-processing method, constructing intimate and durable electronic pathways, thus realizing theoretical decomposition capacity of Na2C2O4 in thick electrodes (54 mg cm-2). This strategy increases the lifespan by 200 cycles and energy density by 82.5% for all-dry-processing sodium-ion batteries with areal capacity of 5.4 mAh cm-2, which highlights the vital role of exploiting mechanical and thermal effects of dry-processing method in sustainable fabrication of high-energy sodium-ion batteries.