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Shallow-layer pillaring of a conductive polymer in monolithic grains to drive superior zinc storageviaa cascading effect
Yao, ZG; Wu, QP; Chen, KY; Liu, JJ; Li, CL
2020-09-01
Source PublicationENERGY & ENVIRONMENTAL SCIENCE
ISSN1754-5692
Issue9Pages:3149
SubtypeArticle
AbstractAqueous Zn metal batteries (ZBs) have obtained increasing attention recently owing to their low-cost and environmentally friendly nature. Unfortunately, the sluggish Zn(2+)de/intercalation in hosts often requires the nanostructural tailoring of cathode materials, which however degrades the tap density and accelerates the dissolution of active species. Herein, we propose a shallow-layer pillaring strategy to drive the superior zinc storage performance of V(2)O(5)monolithic grains without the prerequisite of intentional nanoscale attenuation. Thein situpolymerized 3,4-ethylenedioxythiophene chains only in the near-surface V(2)O(5)interlayers are sufficient to activate a cascading effect to successively open the deeper interlayers during Zn intercalation. This synergic interlayer expansion mechanism leads to a thorough and quick redox process of bulk phase V(2)O(5)even with micro-sized grains as opposed to the poor reaction kinetics in the non-pillared one. In contrast to excess pillaring or cation doping, the shallow-layer hybridization with a hydrophobic conductive polymer can suppress the dissolution of active species, reinforce the conductive contact between grains, lower the Zn(2+)diffusion barrier (0.39 eV) and absorption energy (0.17 eV), and upgrade the pseudocapacitance contribution (>67%) and Zn(2+)diffusion coefficient (1.43 x 10(-9)-1.81 x 10(-8)cm(2)s(-1)). This composite cathode enables an unprecedented cycling/rate performance (e.g.388, 367 and 351 mA h g(-1)even at 5, 8 and 10 A g(-1)respectively, and 269 mA h g(-1)after 4500 cycles at 10 A g(-1)), corresponding to high energy densities of 280.2 and 205.8 W h kg(-1)under ultrahigh power densities of 700.5 and 5960 W kg(-1), respectively. This concept of shallow-layer pillaring activation (especiallyviarich organic molecules) can be extended to more electrode systems with the preservation of the grain integrity.
DOI10.1039/d0ee01531h
WOS KeywordCATHODE MATERIAL ; BATTERY ; LI ; CHEMISTRY
Language英语
WOS Research AreaChemistry ; Energy & Fuels ; Engineering ; Environmental Sciences & Ecology
PublisherROYAL SOC CHEMISTRY
Citation statistics
Cited Times:1[WOS]   [WOS Record]     [Related Records in WOS]
Document Type期刊论文
Identifierhttp://ir.sic.ac.cn/handle/331005/27784
Collection中国科学院上海硅酸盐研究所
Recommended Citation
GB/T 7714
Yao, ZG,Wu, QP,Chen, KY,et al. Shallow-layer pillaring of a conductive polymer in monolithic grains to drive superior zinc storageviaa cascading effect[J]. ENERGY & ENVIRONMENTAL SCIENCE,2020(9):3149.
APA Yao, ZG,Wu, QP,Chen, KY,Liu, JJ,&Li, CL.(2020).Shallow-layer pillaring of a conductive polymer in monolithic grains to drive superior zinc storageviaa cascading effect.ENERGY & ENVIRONMENTAL SCIENCE(9),3149.
MLA Yao, ZG,et al."Shallow-layer pillaring of a conductive polymer in monolithic grains to drive superior zinc storageviaa cascading effect".ENERGY & ENVIRONMENTAL SCIENCE .9(2020):3149.
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