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微观结构调控的NaV(PO)@C电极用于超长寿命钠离子电池。

Microstructure tuned NaV(PO)@C electrodes toward ultra-long-life sodium-ion batteries.

作者信息

Kate Ranjit S, Bhattacharjee Kaustav, Kulkarni Milind V, Kale Bharat B, Deokate Ramesh J, Kalubarme Ramchandra S

机构信息

Vidya Pratishthan's Arts, Science and Commerce College Vidyanagari Baramati 413133 India

Centre for Materials for Electronics Technology Panchavati, Off. Dr Homi Bhabha Road, Pashan Pune 411008 India

出版信息

RSC Adv. 2024 Aug 12;14(34):25062-25070. doi: 10.1039/d4ra04221b. eCollection 2024 Aug 5.

DOI:10.1039/d4ra04221b
PMID:39135972
原文链接:https://pmc.ncbi.nlm.nih.gov/articles/PMC11317794/
Abstract

Sodium-ion batteries (SIBs) are emerging as the best replacement for Li-ion batteries. In this regard, research on developing a reliable cathode material for SIBs is burgeoning. Rhombohedral NaV(PO) (NVP), is a typical sodium super ionic conductor (NASICON) type material having prominent usage as a cathode material for SIBs. In this study, we prepared an NVP@C composite using a one-step hydrothermal method (at 180 °C) and consecutively calcined at different temperatures (750, 800, 850, and 900 °C). All the samples were thoroughly characterized and the changes in the crystal structure and particle size distribution were investigated using a Rietveld refinement method. NVP calcined at 850 °C exhibits the best battery performance with a discharge capacity of 94 mA h g and retention up to 90% after 250 cycles at 2C. It also exhibits remarkable cycling stability with 94% (63 mA h g) retention after 2000 cycles at high-rate endurance (10C). The observed electrochemical performances of the samples were correlated with improved electrical conductivity due to the conductive carbon mixing with NaV(PO) and enhancement in the crystallinity.

摘要

钠离子电池（SIBs）正在成为锂离子电池的最佳替代品。在这方面，开发用于SIBs的可靠阴极材料的研究正在蓬勃发展。菱面体NaV(PO)（NVP）是一种典型的钠超离子导体（NASICON）型材料，作为SIBs的阴极材料有突出的用途。在本研究中，我们采用一步水热法（在180°C）制备了NVP@C复合材料，并在不同温度（750、800、850和900°C）下连续煅烧。对所有样品进行了全面表征，并使用Rietveld精修方法研究了晶体结构和粒度分布的变化。在850°C煅烧的NVP表现出最佳的电池性能，放电容量为94 mA h g，在2C下250次循环后保留率高达90%。在高倍率耐久性（10C）下2000次循环后，它还表现出显著的循环稳定性，保留率为94%（63 mA h g）。观察到的样品电化学性能与由于导电碳与NaV(PO)混合而提高的电导率以及结晶度的提高有关。

https://cdn.ncbi.nlm.nih.gov/pmc/blobs/cc70/11317794/a4668ecdc235/d4ra04221b-f7.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/cc70/11317794/3e33fec501f4/d4ra04221b-s1.jpg
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https://cdn.ncbi.nlm.nih.gov/pmc/blobs/cc70/11317794/358001c15642/d4ra04221b-f3.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/cc70/11317794/5cab1cc311c5/d4ra04221b-f4.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/cc70/11317794/2d2053d43a45/d4ra04221b-f5.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/cc70/11317794/b429f8018cce/d4ra04221b-f6.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/cc70/11317794/a4668ecdc235/d4ra04221b-f7.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/cc70/11317794/3e33fec501f4/d4ra04221b-s1.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/cc70/11317794/ae7e05438d47/d4ra04221b-f1.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/cc70/11317794/756dff5a859a/d4ra04221b-f2.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/cc70/11317794/358001c15642/d4ra04221b-f3.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/cc70/11317794/5cab1cc311c5/d4ra04221b-f4.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/cc70/11317794/2d2053d43a45/d4ra04221b-f5.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/cc70/11317794/b429f8018cce/d4ra04221b-f6.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/cc70/11317794/a4668ecdc235/d4ra04221b-f7.jpg

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本文引用的文献

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