Unraveling Paradoxical Effects of Large Current Density on Zn Deposition

Liu, Zhexuan1,2; Liu, Jiachang1,2; Xiao, Xiao1,2; Zheng, Zhiyang1,2; Zhong, Xiongwei3; Fu, Qingjin1,2; Wang, Shaogang4; Zhou, Guangmin1,2

2024-07-01

10.1002/adma.202404140

ADVANCED MATERIALS   影响因子和分区

0935-9648

1521-4095

["Aqueous zinc-based batteries (ZBs) have been widely investigated owing to their intrinsic safety, low cost, and simple assembly. However, the actual behavior of Zn deposition under large current density is still a severe issue associated with obscure mechanism interpretation of ZBs under high loading. Here, differing from the conventional understanding that short circuit is induced by dendrite penetrating under large current density (10-100 mA cm-2), the separator permeation effect is unraveled to illustrate the paradox between smooth deposition and short lifespan. Generally, a dense plating morphology is achieved under large current density because of intensive nuclei and boosted plane growth. Nevertheless, in the scenes applying separators, the multiplied local current density derived from narrow separator channels leads to rapid Zn2+ exhaustion, converting the Zn deposition mode from nucleation control to concentration control, which eventually results in separator permeation and short circuit. This effect is validated in other aqueous metal anodes (Cu, Sn, Fe) and receives similar results. Based on the understanding, a micro-pore (150 mu m) sponge foam is proposed as separators for large-current anodes to provide broader Zn2+ path and mitigate the separator permeation effect. This work provides unique perspectives on coordinating fast-charging ability and anode stability of ZBs.","The paradox between oriented Zn deposition and poor cell lifetime during large current operation is revealed to be relevant with the multiplied current density in the separator channels. Furthermore, this phenomenon is described as the separator permeation effect, which explains the rapid short circuit despite smooth Zn deposition. image"]

large current density nucleation plane growth separator channel zinc-based battery

SCI ; EI

英语

其他

National Natural Science Foundation of China[22309077] ; Guangdong Innovative and Entrepreneurial Research Team Program[2021ZT09L197] ; Guangdong Basic and Applied Basic Research Foundation[2022A1515110117] ; Shenzhen Science and Technology Program[KQTD20210811090112002] ; null[2019YFA0705703]

Chemistry ; Science & Technology - Other Topics ; Materials Science ; Physics

Chemistry, Multidisciplinary ; Chemistry, Physical ; Nanoscience & Nanotechnology ; Materials Science, Multidisciplinary ; Physics, Applied ; Physics, Condensed Matter

WOS:001209584900001

WILEY-V C H VERLAG GMBH

20241816018768

Anodes ; Charging (batteries) ; Current density ; Deposition ; Secondary batteries ; Separators ; Zinc

Zinc and Alloys:546.3 ; Electricity: Basic Concepts and Phenomena:701.1 ; Secondary Batteries:702.1.2 ; Electron Tubes:714.1 ; Chemical Operations:802.3 ; Crystal Growth:933.1.2

MATERIALS SCIENCE

Web of Science

1.Tsinghua Univ, Tsinghua Berkeley Shenzhen Inst, Shenzhen 518055, Peoples R China
2.Tsinghua Univ, Tsinghua Shenzhen Int Grad Sch, Shenzhen 518055, Peoples R China
3.Southern Univ Sci & Technol, Dept Mat Sci & Engn, Shenzhen 518055, Peoples R China
4.Chinese Acad Sci, Inst Met Res, Shenyang Natl Lab Mat Sci, Shenyang 110016, Peoples R China

Liu, Zhexuan,Liu, Jiachang,Xiao, Xiao,et al. Unraveling Paradoxical Effects of Large Current Density on Zn Deposition[J]. ADVANCED MATERIALS,2024,36(27).

Liu, Zhexuan.,Liu, Jiachang.,Xiao, Xiao.,Zheng, Zhiyang.,Zhong, Xiongwei.,...&Zhou, Guangmin.(2024).Unraveling Paradoxical Effects of Large Current Density on Zn Deposition.ADVANCED MATERIALS,36(27).

Liu, Zhexuan,et al."Unraveling Paradoxical Effects of Large Current Density on Zn Deposition".ADVANCED MATERIALS 36.27(2024).