DataVXACS Applied Energy MaterialsPaper
journal article·2019-07-22

Surface-Based Li+ Complex Enables Uniform Lithium Deposition for Stable Lithium Metal Anodes

Qian Wang, Chengkai Yang, Yufei Zhang, JiJin Yang, Kai Wu, Cejun Hu, Jing Lu, Wen Liu, Henghui Zhou

ACS Applied Energy Materials· Volume 2· Issue 7
Publisher page
Source abstract

Abstract

Uncontrollable Li dendrites growth and low Coulombic efficiency (CE) have severely prevented the practical applications of Li metal anode. Here, we propose to use poly(ethylene glycol) (PEG) as an electrolyte additive for suppressing dendritic growth and improving the cycling stability of Li metal anode. The PEG molecule can be absorbed on the surface of Li metal and complex with the Li+ ions effectively, which ensures a homogeneous diffusion of Li+ near the electrode surface and fundamentally avoids dendrite formation. Thus, full cells with LiFePO4|Li configuration can even maintain ∼100% capacity with CE > 99.5% after 250 cycles at 5.0 C.
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Research context

Energy storageMaterials processing

OpenAlex topics: Advanced Battery Materials and Technologies · Advancements in Battery Materials · Advanced Battery Technologies Research

SciVX discovery tags are terminology-based. OpenAlex topics are source-provided classifications.

Affiliations

College of Chemistry and Molecular Engineering, Peking University, 100871 Beijing, China

State Key Laboratory of Chemical Resource Engineering, College of Science & College of Energy, Beijing University of Chemical Technology, 100092 Beijing, China

School of Physics, Peking University, 100871 Beijing, China

Beijing Engineering Research Center of Power Lithium-Ion Battery, 102202 Beijing, China

Funding

Natural Science Foundation of Beijing Municipality · Beijing University of Chemical Technology · National Natural Science Foundation of China · Pulead Technology Industry Co., Ltd.

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