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Mechanistic Insights of Zn2+ Storage in Sodium Vanadates
Advanced Energy Materials ( IF 24.4 ) Pub Date : 2018-08-09 , DOI: 10.1002/aenm.201801819 Xun Guo 1 , Guozhao Fang 1 , Wenyu Zhang 1 , Jiang Zhou 1 , Lutong Shan 1 , Liangbing Wang 1 , Chao Wang 2 , Tianquan Lin 2, 3 , Yan Tang 1 , Shuquan Liang 1
Advanced Energy Materials ( IF 24.4 ) Pub Date : 2018-08-09 , DOI: 10.1002/aenm.201801819 Xun Guo 1 , Guozhao Fang 1 , Wenyu Zhang 1 , Jiang Zhou 1 , Lutong Shan 1 , Liangbing Wang 1 , Chao Wang 2 , Tianquan Lin 2, 3 , Yan Tang 1 , Shuquan Liang 1
Affiliation
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Rechargeable aqueous zinc‐ion batteries (ZIBs) with high safety and low‐cost are highly desirable for grid‐scale energy storage, yet the energy storage mechanisms in the current cathode materials are still complicated and unclear. Hence, several sodium vanadates with NaV3O8‐type layered structure (e.g., Na5V12O32 and HNaV6O16·4H2O) and β‐Na0.33V2O5‐type tunneled structure (e.g., Na0.76V6O15) are constructed and the storage/release behaviors of Zn2+ ions are deeply investigated in these two typical structures. It should be mentioned that the 2D layered Na5V12O32 and HNaV6O16·4H2O with more effective path for Zn2+ diffusion exhibit higher ion diffusion coefficients than that of tunneled Na0.76V6O15. As a result, Na5V12O32 delivers higher capacity than that of Na0.76V6O15, and a long‐term cyclic performance up to 2000 cycles at 4.0 A g−1 in spite of its capacity fading. This work provides a new perspective of Zn2+ storage mechanism in aqueous ZIB systems.
中文翻译：
钒酸钠中Zn2 +储存的机理研究
具有高安全性和低成本的可再充电含水锌离子电池（ZIBs）非常适合电网规模的储能，但是目前正极材料中的储能机理仍然很复杂且不清楚。因此，几个与钠钒酸盐的NaV 3 ö 8型分层结构（例如，Na 5 V 12 ö 32和HNaV 6 ö 16 ·4H 2 O）和β-的Na 0.33 V 2 ø 5型隧道结构（例如，Na构造了0.76 V 6 O 15）和Zn 2+的存储/释放行为在这两个典型结构中对离子进行了深入研究。应当指出，具有更有效的Zn 2+扩散路径的二维层状Na 5 V 12 O 32和HNaV 6 O 16 ·4H 2 O的离子扩散系数高于隧穿Na 0.76 V 6 O 15的离子扩散系数。结果，Na 5 V 12 O 32的容量高于Na 0.76 V 6 O 15的容量，并且在4.0 A g -1时具有高达2000次循环的长期循环性能尽管它的容量正在下降。这项工作为水性ZIB系统中Zn 2+的储存机理提供了新的视角。
更新日期：2018-08-09
中文翻译：
钒酸钠中Zn2 +储存的机理研究
具有高安全性和低成本的可再充电含水锌离子电池（ZIBs）非常适合电网规模的储能，但是目前正极材料中的储能机理仍然很复杂且不清楚。因此，几个与钠钒酸盐的NaV 3 ö 8型分层结构（例如，Na 5 V 12 ö 32和HNaV 6 ö 16 ·4H 2 O）和β-的Na 0.33 V 2 ø 5型隧道结构（例如，Na构造了0.76 V 6 O 15）和Zn 2+的存储/释放行为在这两个典型结构中对离子进行了深入研究。应当指出，具有更有效的Zn 2+扩散路径的二维层状Na 5 V 12 O 32和HNaV 6 O 16 ·4H 2 O的离子扩散系数高于隧穿Na 0.76 V 6 O 15的离子扩散系数。结果，Na 5 V 12 O 32的容量高于Na 0.76 V 6 O 15的容量，并且在4.0 A g -1时具有高达2000次循环的长期循环性能尽管它的容量正在下降。这项工作为水性ZIB系统中Zn 2+的储存机理提供了新的视角。
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