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Start Over Author "Shengming Li" Journal nature communications
4 results on '"Shengming Li"'

1. Sustainably powering wearable electronics solely by biomechanical energy

Author

Jie Wang, Shengming Li, Fang Yi, Yunlong Zi, Jun Lin, Xiaofeng Wang, Youlong Xu, and Zhong Lin Wang

Subjects
Science
Abstract

Harvesting bio-mechanical energy is a promising route to powering wearable electronics, however design obstacles remain. Here the authors report on a triboelectric nanogenerator with optimized materials and design that can sustainably power an electronic watch and fitness tracker solely by human motion.

Published
2016
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2. Effective energy storage from a triboelectric nanogenerator

Author

Yunlong Zi, Jie Wang, Sihong Wang, Shengming Li, Zhen Wen, Hengyu Guo, and Zhong Lin Wang

Subjects
Science
Abstract

Self-charging systems based on the connection of a nanogenerator and an energy storage unit through a rectifier can have low energy storage efficiencies. Here, the authors design the charging cycle to maximize the energy storage efficiency of a triboelectric nanogenerator by introducing a motion-induced switch.

Published
2016
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3. Effect of high-dose N-acetylcysteine on exacerbations and lung function in patients with mild-to-moderate COPD: a double-blind, parallel group, multicentre randomised clinical trial

Author

Yumin Zhou, Fan Wu, Zhe Shi, Jie Cao, Jia Tian, Weimin Yao, Liping Wei, Fenglei Li, Shan Cai, Yao Shen, Zanfeng Wang, Huilan Zhang, Yanfan Chen, Yingyun Fu, Zhiyi He, Chun Chang, Yongliang Jiang, Shujing Chen, Changli Yang, Shuqing Yu, Heshen Tian, Qijian Cheng, Ziwen Zhao, Yinghua Ying, Yong Zhou, Shengming Liu, Zhishan Deng, Peiyu Huang, Yunzhen Zhang, Xiangwen Luo, Haiyan Zhao, Jianping Gui, Weiguang Lai, Guoping Hu, Cong Liu, Ling Su, Zhiguang Liu, Jianhui Huang, Dongxing Zhao, Nanshan Zhong, Pixin Ran, and On behalf of China N-acetylcysteine in Mild-to-moderate COPD Study Group

Subjects
Science
Abstract

Abstract Evidence for the treatment of patients with mild-to-moderate chronic obstructive pulmonary disease (COPD) is limited. The efficacy of N-acetylcysteine (an antioxidant and mucolytic agent) for patients with mild-to-moderate COPD is uncertain. In this multicentre, randomised, double-blind, placebo-controlled trial, we randomly assigned 968 patients with mild-to-moderate COPD to treatment with N-acetylcysteine (600 mg, twice daily) or matched placebo for two years. Eligible participants were 40-80 years of age and had mild-to-moderate COPD (forced expiratory volume in 1 second [FEV1] to forced vital capacity ratio

Published
2024
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4. Effective energy storage from a triboelectric nanogenerator

Author

Hengyu Guo, Yunlong Zi, Sihong Wang, Zhong Lin Wang, Zhen Wen, Shengming Li, and Jie Wang

Subjects
Materials science, Science, General Physics and Astronomy, Nanotechnology, 02 engineering and technology, 010402 general chemistry, 01 natural sciences, 7. Clean energy, General Biochemistry, Genetics and Molecular Biology, Energy storage, Article, Rectifier, Motion, Electric Power Supplies, Electricity, Power electronics, Animals, Humans, Electronics, Mechanical energy, Triboelectric effect, Multidisciplinary, business.industry, Nanogenerator, Electrical engineering, General Chemistry, Equipment Design, 021001 nanoscience & nanotechnology, 0104 chemical sciences, Electrodes, Implanted, 0210 nano-technology, business
Abstract

To sustainably power electronics by harvesting mechanical energy using nanogenerators, energy storage is essential to supply a regulated and stable electric output, which is traditionally realized by a direct connection between the two components through a rectifier. However, this may lead to low energy-storage efficiency. Here, we rationally design a charging cycle to maximize energy-storage efficiency by modulating the charge flow in the system, which is demonstrated on a triboelectric nanogenerator by adding a motion-triggered switch. Both theoretical and experimental comparisons show that the designed charging cycle can enhance the charging rate, improve the maximum energy-storage efficiency by up to 50% and promote the saturation voltage by at least a factor of two. This represents a progress to effectively store the energy harvested by nanogenerators with the aim to utilize ambient mechanical energy to drive portable/wearable/implantable electronics., Self-charging systems based on the connection of a nanogenerator and an energy storage unit through a rectifier can have low energy storage efficiencies. Here, the authors design the charging cycle to maximize the energy storage efficiency of a triboelectric nanogenerator by introducing a motion-induced switch.

Published
2015

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