Space-confined strategy to stabilize the lithium storage in the graphene and silver nanoparticles (AgNPs@GO) composite anode of lithium metal batteries
| Autor: | Chenhui Yang, Junru Zheng, Guangping He, Zhen Ma, Depei Zheng, Yuanfeng Kong, Junmin Nan |
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| Rok vydání: | 2019 |
| Předmět: |
Materials science
Graphene Annealing (metallurgy) Mechanical Engineering 02 engineering and technology Overpotential 010402 general chemistry 021001 nanoscience & nanotechnology Condensed Matter Physics Electrochemistry 01 natural sciences Silver nanoparticle 0104 chemical sciences law.invention Anode Metal Chemical engineering Mechanics of Materials law visual_art visual_art.visual_art_medium General Materials Science 0210 nano-technology Faraday efficiency |
| Zdroj: | Materials Letters. 251:118-121 |
| ISSN: | 0167-577X |
| DOI: | 10.1016/j.matlet.2019.05.068 |
| Popis: | A flower-like oxidized graphene and metal silver nanoparticles composite (AgNPs@GO) was prepared by a spray-drying and annealing process. The AgNPs@GO exhibits three-dimensional (3D) multi-layer heterojunction structure and high surface area, which can reduce the overpotential of lithium deposition, decrease lithium dendrites, and stabilize lithium storage. Especially, an excellent electrochemical performance is obtained due to the space-confined feature of AgNPs@GO structure. At 0.25 mA cm−2 for 0.5 mAh cm−2, the AgNPs@GO-300 reveals a hysteresis voltage of only 32.3 mV at the 10th cycle and a stable coulombic efficiency of 97.1% after nearly 1000 h cycles, indicating promising prospects as lithium metal anode. |
| Databáze: | OpenAIRE |
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