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3. Recent Advances in Triboelectric Nanogenerators: From Technological Progress to Commercial Applications.

Author

Choi, Dongwhi, Lee, Younghoon, Lin, Zong-Hong, Cho, Sumin, Kim, Miso, Ao, Chi, Soh, Siowling, Sohn, Changwan, Jeong, Chang, Lee, Jeongwan, Lee, Minbaek, Lee, Seungah, Ryu, Jungho, Parashar, Parag, Cho, Yujang, Ahn, Jaewan, Kim, Il-Doo, Jiang, Feng, Lee, Pooi, Khandelwal, Gaurav, Kim, Sang-Jae, Kim, Hyun, Song, Hyun-Cheol, Kim, Minje, Nah, Junghyo, Kim, Wook, Menge, Habtamu, Park, Yong, Xu, Wei, Hao, Jianhua, Park, Hyosik, Lee, Ju-Hyuck, Lee, Dong-Min, Kim, Sang-Woo, Park, Ji, Zhang, Haixia, Zi, Yunlong, Guo, Ru, Cheng, Jia, Yang, Ze, Xie, Yannan, Lee, Sangmin, Chung, Jihoon, Oh, Il-Kwon, Kim, Ji-Seok, Cheng, Tinghai, Gao, Qi, Cheng, Gang, Gu, Guangqin, Shim, Minseob, Jung, Jeehoon, Yun, Changwoo, Zhang, Chi, Liu, Guoxu, Chen, Yufeng, Kim, Suhan, Chen, Xiangyu, Hu, Jun, Pu, Xiong, Guo, Zi, Wang, Xudong, Chen, Jun, Xiao, Xiao, Xie, Xing, Jarin, Mourin, Zhang, Hulin, Lai, Ying-Chih, He, Tianyiyi, Kim, Hakjeong, Park, Inkyu, Ahn, Junseong, Huynh, Nghia, Yang, Ya, Wang, Zhong, Baik, Jeong, and Choi, Dukhyun

Subjects
Triboelectric nanogenerator, applications, circuits, device designs, energy harvesting, mechanical energy, mechanical systems, tribomaterials
Abstract

Serious climate changes and energy-related environmental problems are currently critical issues in the world. In order to reduce carbon emissions and save our environment, renewable energy harvesting technologies will serve as a key solution in the near future. Among them, triboelectric nanogenerators (TENGs), which is one of the most promising mechanical energy harvesters by means of contact electrification phenomenon, are explosively developing due to abundant wasting mechanical energy sources and a number of superior advantages in a wide availability and selection of materials, relatively simple device configurations, and low-cost processing. Significant experimental and theoretical efforts have been achieved toward understanding fundamental behaviors and a wide range of demonstrations since its report in 2012. As a result, considerable technological advancement has been exhibited and it advances the timeline of achievement in the proposed roadmap. Now, the technology has reached the stage of prototype development with verification of performance beyond the lab scale environment toward its commercialization. In this review, distinguished authors in the world worked together to summarize the state of the art in theory, materials, devices, systems, circuits, and applications in TENG fields. The great research achievements of researchers in this field around the world over the past decade are expected to play a major role in coming to fruition of unexpectedly accelerated technological advances over the next decade.

Published
2023

19. Triboelectric Nanogenerator for Sports

Author

Prasanna, Asokan Poorani Sathya, Khandelwal, Gaurav, Kim, Sang-Jae, Wang, Zhong Lin, Section editor, Yang, Ya, Section editor, Wang, Zhong Lin, editor, Yang, Ya, editor, Zhai, Junyi, editor, and Wang, Jie, editor

Published
2023
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47. Unveiling the effect of growth time on bifunctional layered hydroxide electrodes for high-performance energy storage and green energy conversion.

Author

Das, Jyoti Prakash, Nardekar, Swapnil Shital, Kesavan, Dhanasekar, Bhunia, Kousik, Ravichandran, Vishwanathan, and Kim, Sang-Jae

Abstract

Tailoring the properties of transition metal-based layered double hydroxides is inevitable for high-performance energy storage and efficient urea-electro-oxidation reaction (UOR) for effectively harnessing energy from urea-rich wastewater. Herein, the effect of growth time on the bi-functional properties of NiCo layered double hydroxide (Ni–Co LDH) is unveiled. Under the optimum growth time, the NiCo LDH electrode shows an excellent specific capacity of 210.5 mA h g−1 at 2.5 mA cm−2, outperforming many binder-free electrodes reported previously. Further, an asymmetric supercapacitor (ASC) is fabricated, exhibiting exceptional energy storage capabilities in terms of a specific capacitance of 77.7 F g−1, energy density of 22.6 W h kg−1, and excellent cycling stability with capacity retention of 86.8%. The ASC is encapsulated with a 3D-printed casing to power miniature electronics. The as-synthesized electrode was explored as an efficient electrocatalyst for the UOR. The lower onset potential with optimized catalytic behavior paves the way for green energy harvesting from urea-rich water through efficient UOR. The controlled growth morphology and reaction time influence the UOR and energy storage efficiency of the bimetallic LDH. This study provides meaningful insights into the tailor-made performance enhancement of bi-functional electrodes for energy storage and efficient energy conversion. [ABSTRACT FROM AUTHOR]

Published
2024
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48. Unravelling the Bi‐Functional Electrocatalytic Properties of {Mo72Fe30} Polyoxometalate Nanostructures for Overall Water Splitting Using Scanning Electrochemical Microscope and Electrochemical Gating Methods.

Author

Krishnamoorthy, Karthikeyan, Pazhamalai, Parthiban, Swaminathan, Rajavarman, Mohan, Vigneshwaran, and Kim, Sang‐Jae

Subjects
WATER use, AUTHENTIC assessment, MICROSCOPES, NANOSTRUCTURES, ELECTROLYTIC cells
Abstract

This study reports the use of Keplerate‐type {Mo72Fe30} polyoxometalate (POMs) nanostructures as a bi‐functional‐electrocatalyst for HER and OER in an alkaline medium with a lower overpotential (135 mV for HER and 264 mV for OER), and excellent electrochemical stability. The bi‐functional catalytic properties of {Mo72Fe30} POM are studied using a scanning electrochemical microscope (SECM) via current mapping using substrate generation and tip collection mode. Furthermore, the bipolar nature of the {Mo72Fe30} POM nano‐electrocatalysts is studied using the electrochemical gating via simultaneous monitoring of the electrochemical (cell) and electrical ({Mo72Fe30} POM) signals. Next, a prototype water electrolyzer fabricated using {Mo72Fe30} POM electrocatalysts showed they can drive 10 mA cm−2 with a low cell voltage of 1.62 V in lab‐scale test conditions. Notably, the {Mo72Fe30} POM electrolyzers' performance assessment based on recommended conditions for industrial aspects shows that they require a very low overpotential of 1.89 V to drive 500 mA cm−2, highlighting their promising candidature toward clean‐hydrogen production. [ABSTRACT FROM AUTHOR]

Published
2024
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