- Address
- 305-0044 茨城県つくば市並木1-1 [アクセス]
学生受け入れ中
研究内容
出版物2004年以降のNIMS所属における研究成果や出版物を表示しています。
論文
- Lok Kumar Shrestha, Rekha Goswami Shrestha, Sabina Shahi, Chhabi Lal Gnawali, Mandira Pradhananga Adhikari, Biswa Nath Bhadra, Katsuhiko Ariga. Biomass Nanoarchitectonics for Supercapacitor Applications. Journal of Oleo Science. 72 [1] (2023) ess22377 10.5650/jos.ess22377 Open Access
- Jonathan P. Hill, Rekha Goswami Shrestha, Jingwen Song, Qingmin Ji, Katsuhiko Ariga, Lok Kumar Shrestha. Monitoring the Release of Silver from a Supramolecular Fullerene C60-AgNO3 Nanomaterial. BULLETIN OF THE CHEMICAL SOCIETY OF JAPAN. (2021) 1347-1354
- Olga Guselnikova, Andrii Trelin, Yunqing Kang, Pavel Postnikov, Makoto Kobashi, Asuka Suzuki, Lok Kumar Shrestha, Joel Henzie, Yusuke Yamauchi. Pretreatment-free SERS sensing of microplastics using a self-attention-based neural network on hierarchically porous Ag foams. Nature Communications. 15 [1] (2024) 4351 10.1038/s41467-024-48148-w Open Access
書籍
- SHRESTHA, Lok Kumar, Kenji Aramaki. Non-aqueous Foams: Formation and Stability. Foam Engineering: Fundamentals and Applications. , 2012, 169-206.
口頭発表
- SHRESTHA, Lok Kumar. Hierarchically Porous Carbon Materials from Self-Assembled Fullerene Crystals for Energy Storage Applications. International Conference on Advanced Functional Materials 2024 Kathmandu (ICAFM 2024) . 2024 招待講演
- SHRESTHA, Lok Kumar. Supramolecular Self-Assembly of Fullerenes from Zero-to-Higher Dimensions. Soft Interface Seminar XLII. 2024 招待講演
- SHRESTHA, Lok Kumar. Supramolecular Self-Assembly of Fullerene and Derived Hierarchically Porous Carbon Materials for Energy Storage Applications. International Conference on Nanotechnology and Smart Materials (Smart Nano-2024). 2024 招待講演
その他の文献
- SHRESTHA, Lok Kumar, ARIGA, Katsuhiko. Bio-Related Applications of Fullerene Nanowhiskers and Related Assemblies: Cell Culture, Sensing and Supramolecular Differentiation. Fullerene Nanowhiskers. (2019) 233-246
- SHRESTHA, Lok Kumar, ARIGA, Katsuhiko. Fullerene Nanoarchitectonics for One-Dimensional Nanostructures and Their Array. Nanostructured Materials: Synthesis, Properties and Applications. (2019) 293-303
- 有賀 克彦, スレスタ ロック クマール. フラーレンナノアーキテクトニクス：ゼロ次元からの多彩な自己組織化構造. オレオサイエンス. (2021) 221-225
所属学会
日本化学会, The Asian Society for Colloid and Surface Science (ASCASS)
ナノアーキテクトニクス材料研究センター
フラーレンベースの新しいナノ多孔質炭素材料の設計
自己組織化，機能性材料，センシング，エネルギー貯蔵，エネルギー変換，生物学的応用
概要
Fullerenes (C60 or C70) are zero-dimensional functional molecules that undergo supramolecular self-assembly due to their high symmetries and extended π-conjugated systems and form various shape-controlled micro- or nanosized crystalline objects. In NIMS, we have developed method to directly convert these highly crystalline π-electron-rich fullerene nanomaterials into hierarchically porous graphitic carbon materials with high surface area and interconnected pore structures by high-temperature carbonization, which have significant potential as electrode materials in state-or-art electrochemical energy storage supercapacitors.
新規性・独創性
Porous carbon materials obtained from fullerene crystals exhibit a unified shape and size followed by superior electrochemical energy storage performance over conventional carbon materials because of their large surface areas, improved electrical conductivities, well-defined pore size distributions, and hierarchical and interconnected pore architectures.
内容
We have recently demonstrated novel hollow carbon spheres with hierarchically porous architectures by high-temperature carbonization of self-assembled fullerene-ethylenediamine hollow spheres (FE-HS). FE-HS were prepared by using a dynamic liquid-liquid interfacial precipitation (DLLIP) method at ambient conditions of temperature and pressure. High temperature carbonization (at 700, 900, and 1100 °C) of the FE-HS yielded nanoporous (micro/mesoporous) hollow carbon spheres with large surface areas (612 to 1616 m2 g-1) and large pore volumes (0.925 to 1.346 cm3 g-1) dependent on temperature applied. The sample obtained by carbonization of FE-HS at 900 °C (FE-HS_900) displayed optimum surface area and exhibited remarkable electrochemical electrical double-layer capacitance properties in aq. 1 M sulfuric acid due to its well-developed porosity, interconnected pore structure, and large surface area. The symmetric supercapacitor cell assembled using FE-HS_900 attained 164 F g-1 at 1 A g-1 with sustained 50% capacitance at 10 A g-1accompanied by 96% cycle life and 98% coulombic efficiency after 10,000 consecutive charge/discharge cycles.
まとめ
Thermal annealing processes disrupt the fullerenes carbon-only skeleton contained within the self-assembled structures, maintaining the basic morphology of the starting material, accompanied by surface roughening and the emergence of a high porosity carbon network essential to enhance the energy storage, conversion, and sensing performance.
