首页|Carbon nanocapsules stabilized Cu2O nanocubes as the high-performance electrode material for metal ion battery
Carbon nanocapsules stabilized Cu2O nanocubes as the high-performance electrode material for metal ion battery
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? 2022 Elsevier B.V.Volume expansion and structural instability of electrode materials are the major challenges to limit the ion battery development, especially for electrochemical conversion reactions-based materials. Herein, we developed hollow cuprous oxide nanocubes (HCON) as anode materials for lithium ion battery using a surfactant free, low-cost and large-scale synthesis approach based on self-assembly principle in NaCl solution. HCON delivered significantly high capacity of 202 mAh/g at current density of 1000 mA/g after 200 cycles for Li ion storage and 261 mA h/g at current density of 500 mA/g after 50 cycles for Na ion storage. Furthermore, catalytic chemical vapor deposition (CCVD) technique is employed to address partially crystalline carbon coating on HCON surface for stabilizing structure during Li+ insertion and extraction processes. Partially crystalline carbon decorates including nanodots and nanolayers are produced on HCON surface in relatively lower temperature range of 110–140 °C in CCVD process resulting in the formation of Cu2O/Cu@C hybrid. And Cu2O/Cu@C anode kept discharge retention of 84% for 200 cycles with reversible capacity of 265.3 mA h/g even at high rate of 2000 mA/g, significantly better than pure HCON anode and delivered discharge capacity of 11.3 times of pure HCON electrode (23.4 mAh/g). The reasonable combination of self-assembly approach and CCVD technique offers an effective way to introducing carbon nanomaterials in atomic level for designing high-performance electrode materials in ion battery.
Carbon nanocapsulesCatalytic chemical vapor depositionCuprous oxideIon batteriesNanocubes
Xia M.、Rao G.、Wang J.、Jian X.、Wang H.、Ma J.
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Institute of Powder Metallurgy and Advanced Ceramics School of Materials Science and Engineering University of Science and Technology Beijing
The Yangtze Delta Region Institute (Huzhou) University of Electronic Science and Technology of China
School of Materials and Energy University of Electronic Science and Technology of China
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