{"id":257515,"date":"2021-05-24T16:50:59","date_gmt":"2021-05-24T13:50:59","guid":{"rendered":"https:\/\/en.buradabiliyorum.com\/one-step-method-to-improve-performance-of-cathode-materials-in-na-ion-batteries\/"},"modified":"2021-05-24T16:50:59","modified_gmt":"2021-05-24T13:50:59","slug":"one-step-method-to-improve-performance-of-cathode-materials-in-na-ion-batteries","status":"publish","type":"post","link":"https:\/\/buradabiliyorum.com\/en\/one-step-method-to-improve-performance-of-cathode-materials-in-na-ion-batteries\/","title":{"rendered":"#One-step method to improve performance of cathode materials in Na-ion batteries"},"content":{"rendered":"

“#One-step method to improve performance of cathode materials in Na-ion batteries<\/strong>”<\/p>\n

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\"One-step
\n The electrochemical performance of sodium vanadium fluorophosphate synthesized by mechanochemical method.\u00a0 Credit: Chinese Academy of Science<\/a>s
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Na-ion batteries are promising in large-scale energy storage owing to the abundant raw material resources, low cost and high safety.<\/p>\n

Sodium vanadium fluorophosphate (Na3<\/sub>(VOPO4<\/sub>)2<\/sub>F) with a theoretical energy density of 480 Wh\/Kg is regarded as a strong candidate among various cathode materials. However, the intrinsic low conductivity and high energy-consumption during synthesis process hinder its commercialization. <\/p>\n

Researchers from the Institute of Process Engineering (IPE) and Institute of Physics of the Chinese Academy of Sciences developed one-step mechanochemical method to rapidly prepare the polyanionic compound sodium vanadium fluorophosphate as the cathode materials for Na-ion batteries, which exhibited excellent rate performance and cycle stability. <\/p>\n

This work was published in Nature Communications<\/i> on May 14. <\/p>\n

The prepared Na3<\/sub>(VOPO4<\/sub>)2<\/sub>F\/KB composite delivered a high discharge capacity of 142 mAh g-1 at 0.1C. The extra capacity beyond the theoretical specific capacity (130 mAh g-1) benefited from the interfacial charge storage.<\/p>\n

Moreover, a specific capacity of 112 mAh g-1 can be obtained even at 20 C, which means this Na-ion battery could be fully charged\/discharged in three minutes.<\/p>\n

Superior cycle stability of this composite was demonstrated by an ultrahigh cycling stability with 98% retention over 10,000 cycles.<\/p>\n

High resolution transmission electron microscopy revealed that the nanocrystallines of Na3<\/sub>(VOPO4<\/sub>)2<\/sub>F about 30 nm were embedded in the carbon framework, which facilitated the rapid conduction of electrons and Na ions.<\/p>\n

The reversible structural evolution and negligible volume change of Na3<\/sub>(VOPO4<\/sub>)2<\/sub>F\/KB composite during charging\/discharging were also demonstrated by in situ X-ray diffraction and 23<\/sup>Na nuclear magnetic resonance spectrum. <\/p>\n

“The method provides a feasible strategy to improve the rate performance and cycle performance of cathode materials. Besides, the kilogram-scale product indicates the mechanochemical method is suitable for rapid large-scale production electrode materials for Na-ion batteries,” said Prof. Zhao Junmei, a co-corresponding author of the study.\n <\/p>\n\n

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Researchers develop method for increasing the capacity of next-generation metal-ion battery cathode materials\n <\/p><\/div>\n

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\n More information:<\/strong>
\n Xing Shen et al, Rapid mechanochemical synthesis of polyanionic cathode with improved electrochemical performance for Na-ion batteries, Nature Communications<\/i> (2021). DOI: 10.1038\/s41467-021-23132-w<\/a><\/p><\/div>\n
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\n Chinese Academy of Sciences
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Citation<\/strong>:
\n One-step method to improve performance of cathode materials in Na-ion batteries (2021, May 24)
\n retrieved 24 May 2021
\n from https:\/\/techxplore.com\/news<\/a>\/2021-05-one-step-method-cathode-materials-na-ion.html<\/p>\n

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