Advanced NASICON-Type Na4Fe3(PO4)2(P2O7) Cathode for High-Performance Na+/Li+ Batteries,Inorganic Chemistry

当前位置： X-MOL 学术 › Inorg. Chem. › 论文详情

Our official English website, www.x-mol.net, welcomes your feedback! (Note: you will need to create a separate account there.)

Advanced NASICON-Type Na4Fe3(PO4)2(P2O7) Cathode for High-Performance Na+/Li+ Batteries
Inorganic Chemistry ( IF 4.3 ) Pub Date : 2023-05-25 , DOI: 10.1021/acs.inorgchem.3c00948
Jinqiang Gao ₁ , Yu Mei ₁ , Lianshan Ni ₁ , Haoji Wang ₁ , Bai Song ₂ , Wentao Deng ₁ , Guoqiang Zou ₁ , Hongshuai Hou ₁ , Xiaobo Ji ₁

Affiliation

Na₄Fe₃(PO₄)₂(P₂O₇) (NFPP) is an attractive candidate for Na⁺ batteries (SIBs) and Li⁺ batteries (LIBs). However, the real implementation of NFPP has been critically restrained by the inferior intrinsic electronic conductivity. Herein, in situ carbon-coated mesoporous NFPP, obtained via freeze drying and heat treatment, demonstrates highly reversible insertion/extraction of Na⁺/Li⁺. Mechanically, the electronic transmission and structural stabilities of NFPP are significantly enhanced by the graphitized carbon coating layer. Chemically, the porous nanosized structure shortens Na⁺/Li⁺ diffusion paths and increases the contact area between the electrolyte and NFPP, ultimately rendering fast ion diffusion. Greatly, long-lasting cyclability (88.5% capacity retention for over 5000 cycles), decent thermal stability at 60 °C, and impressive electrochemical performances are demonstrated in LIBs. The insertion/extraction mechanisms of NFPP in both SIBs and LIBs are systematically investigated, confirming its small volume expansion and high reversibility. The superior electrochemical performances and the insertion/extraction mechanism investigation confirm the feasibility of utilizing NFPP as a cathode material for Na⁺/Li⁺ batteries.

中文翻译：

用于高性能 Na+/Li+ 电池的先进 NASICON 型 Na4Fe3(PO4)2(P2O7) 阴极

Na ₄ Fe ₃ (PO ₄ ) ₂ (P ₂ O ₇ ) (NFPP) 是 Na ⁺电池 (SIB) 和 Li ⁺电池 (LIB) 的有吸引力的候选者。然而，NFPP 的实际应用受到较差的本征电子电导率的严重限制。在此，通过冷冻干燥和热处理获得的原位碳涂层介孔 NFPP 展示了 Na + /Li + 的高度可逆^插入/^提取. 在机械方面，石墨化碳涂层显着增强了 NFPP 的电子传输和结构稳定性。在化学上，多孔纳米结构缩短了 Na ⁺ /Li ⁺扩散路径并增加电解质和 NFPP 之间的接触面积，最终呈现快速离子扩散。伟大的是，LIBs 展示了持久的循环性（88.5% 的容量保持超过 5000 次循环）、60 °C 下良好的热稳定性和令人印象深刻的电化学性能。系统地研究了 NFPP 在 SIB 和 LIB 中的插入/提取机制，证实了其体积膨胀小和高可逆性。优异的电化学性能和插入/脱出机理研究证实了利用 NFPP 作为 Na ⁺ /Li ⁺电池正极材料的可行性。

更新日期：2023-05-25

点击分享查看原文

点击收藏

阅读更多本刊新发论文本刊介绍/投稿指南