| 摘要: | 隨著微電子電路、智慧卡及可攜式裝置的快速發展，對於輕量化、高能量密度的薄膜電池需求日益增加。傳統鋰離子薄膜電池雖佔據市場主流，但其安全性與成本問題仍存挑戰。鎳氫薄膜電池憑藉其環保性與優異的循環壽命，在微機電系統（MEMS）與奈米機電系統（NEMS）等應用中展現出巨大潛力。然而，鎳氫電池的負極多使用儲氫合金（HSA）搭配泡沫鎳基材或大量鎳粉，造成活性材料利用率低、放電能力與穩定性不足，以及電極重量過重等問題，嚴重限制了其能量密度與應用前景。
為解決上述瓶頸，本研究提出以多壁奈米碳管（MWNTs）與石墨烯奈米片（GnPs）組成的高導電性碳基複合薄膜（Buckypaper/Graphene Paper, BP/GP）作為新型鎳氫薄膜電池負極基材。
本研究證明了 BP/GP 複合電極在能量密度、電化學穩定性與輕量化方面的顯著優勢，不僅為高效能鎳氫薄膜電池提供了重要的技術基礎，更為未來可撓式微型儲能裝置的研發開啟全新契機。
;With the rapid advancement of microelectronic circuits, smart cards, and portable devices, the demand for lightweight, high-energy-density thin-film batteries has significantly increased. While lithium-ion thin-film batteries currently dominate the market, challenges related to safety and cost remain. Nickel–metal hydride (NiMH) thin-film batteries, known for their environmental friendliness and excellent cycling stability, have emerged as a promising alternative for applications in micro-electromechanical systems (MEMS) and nano-electromechanical systems (NEMS). However, the use of hydrogen storage alloys (HSA) as the active material in traditional NiMH battery negative electrodes, combined with heavy nickel foam substrates and large quantities of nickel powder, often results in low active material utilization, limited discharge capacity and stability, and excessive electrode weight, thereby constraining the battery’s overall energy density and application potential.
To address the limitations, this study proposes the use of a highly conductive carbon-based composite film composed of multi-walled carbon nanotubes (MWNTs) and graphene nanoplatelets (GnPs), referred to as Buckypaper/Graphene Paper (BP/GP), as a novel negative electrode scaffold for NiMH thin-film batteries. Binder-free freestanding films with varying MWNT-to-GnP ratios (C0–C10 samples) were fabricated via suction filtration, resulting in electrodes with excellent electrical conductivity and mechanical integrity.
Overall, this study demonstrates the significant advantages of BP/GP composite electrodes in terms of energy density, electrochemical stability, and lightweight construction, providing a crucial technological foundation for the development of next-generation high-performance, flexible NiMH thin-film batteries and opening new avenues for micro-scale energy storage devices. |
