Journal
ACS NANO
Volume 14, Issue 7, Pages 8539-8550Publisher
AMER CHEMICAL SOC
DOI: 10.1021/acsnano.0c02831
Keywords
conversion-intercalation hybrid; aluminum-ion batteries; 3D MoSe2 nanorod arrays; selenization; flexible and wearable electronics
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Funding
- Ministry of Science and Technology [108-2218-E-007-045-, 107-2923-E-007-002-MY3, 107-2218-E-007-055, 107-2112-M-007-030-MY3, 109-2634-F-007-023, 108-2731-M-007-001]
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The rechargeable aluminum-ion battery (MB) is a promising candidate for next-generation high-performance batteries, but its cathode materials require more development to improve their capacity and cycling life. We have demonstrated the growth of MoSe2 three-dimensional helical nanorod arrays on a polyimide substrate by the deposition of Mo helical nanorod arrays followed by a low-temperature plasma-assisted selenization process to form novel cathodes for AIBs. The binder-free 3D MoSe2-based MB shows a high specific capacity of 753 mAh g(-1) at a current density of 0.3 A g(-1) and can maintain a high specific capacity of 138 mAh g(-1) at a current density of 5 A g(-1) with 10 000 cycles. Ex situ Raman, XPS, and TEM characterization results of the electrodes under different states confirm the reversible alloying conversion and intercalation hybrid mechanism during the discharge and charge cycles. All possible chemical reactions were proposed by the electrochemical curves and characterization. Further exploratory works on interdigital flexible AIBs and stretchable AIBs were demonstrated, exhibiting a steady output capacity under different bending and stretching states. This method provides a controllable strategy for selenide nanostructure-based AIBs for use in future applications of energy-storage devices in flexible and wearable electronics.
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