JOURNAL OF ALLOYS AND COMPOUNDS
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2022
·
IF 6.371
Xiaofei Liu,Jian Wang,Zhonghui Shen,Hongjian Zhang,Baowen Li,Yong Zhang,Xin Zhang
Flexible organic/inorganic piezoelectric nanocomposites are highly demanded for flexible wearable electronic devices due to their excellent mechanical flexibility and high piezoelectric performance. However, the output performance of ceramic-polymer-based piezoelectric nanogenerators (PENGs) is restricted by the poor electrical conductivity of the organic matrix and the distinct discrepancy in mechanical strength between inorganic filler and organic matrix. Herein, we propose a flexible piezoelectric polymer nanocomposite based on CNTs@PZT nanofibers (NFs) network where the carbon nanotubes (CNTs) were introduced into the piezoelectric lead zirconate titanate (PZT) NFs to simultaneously improve the electrical conductivity and mechanical strength of nanocomposites. When subjected to a periodical bending deformation , the CNTs@PZT NFs network-based PENG with optimal addition of CNTs (0.6 wt%) generates a maximum electrical output up to ∼12.5 V and ∼80 nA cm −2 which is four times higher than that of PENGs without CNTs doping. An ultrahigh power density of 91.7 nW cm −2 is obtained with an external load resistance of 40 MΩ when pressed via a 10 N compressive force , and furthermore, the generated power could charge a capacitor and further light a commercial LED. This work may pave a new way for the development of high-output nanocomposite-type PENGs.
研究领域:
材料科学
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纳米科技
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能源材料
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柔性电子学
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功能材料
✓ 已验证
DOI
高影响因子
CHEMICAL ENGINEERING JOURNAL
·
2022
·
IF 16.744
Xinkai Xie,Yuxiao Fang,Cheng Lu,Yi Tao,Li Yin,Yibo Zhang,Zixin Wang,Shiyan Wang,Jianwen Zhao,Xin Tu,Xuhui Sun,Eng Gee Lim,Chun Zhao,Yina Liu,Zhen Wen
Provided that electron transition ascribed to overlapping electron dominates the mechanism of contact electrification of triboelectric nanogenerators (TENGs), the electron transfer process occurs due to the built-up electric field between the triboelectrification surface and bottom electrode. In this work, we embed a solution-processed high-permittivity electron blocking layer (HPEBL) of LaZrO into the classical contact-separation mode TENG to build an energy barrier (ΔE > 1.3 eV) between ITO and PDMS, which could effectively block the transportation of electrons towards the bottom electrode. The surface potential decline rate of PDMS is obviously suppressed, extending the half-charge decay time by ∼3.1 times. A La 0.1 Zr 0.9 O x HPEBL based TENG (H-TENG) demonstrates the electrical outputs with 215 V, 96.3 mA m −2 and 243.3 μC/m −2 . Under the external load of 100 MΩ, the average gravimetric/volumetric power density and energy conversion efficiency can be calculated to be 59.34 μW g −1 , 152.5 μW cm −3 and 39.2%, respectively. Furthermore, the dielectric behaviors of LaZrO thin films are investigated by metal–insulator-metal (MIM) devices. The Poole-Frenkel (PF) emission is found to dominate the leakage mechanism of LaZrO during operation. Consequently, increasing the relative permittivity and reducing the trap density could be indicated as the optimization orientation of HPEBL.
研究领域:
纳米技术
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能量收集
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材料科学
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电子学
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表面物理
✓ 已验证
DOI
高影响因子
Journal of Nanomaterials
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2017
·Vol. 2017
·期 1
·4301768
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IF 1.871
Wei Liu,Jiayu Guo,Zhonghua Fan,Xiaorong Wang,Dingkun Yu,Rong Chen,Shisheng Huang,Peng He
We have investigated the influence of heat treatment on the morphologies of copper nanoparticles based films on glass slides by a spin coating method. The experiments show that heat treatment can modify the sizes and morphologies of copper nanoparticles based films on glass slides. We suggest that through changing the parameters of heat treatment process may be helpful to vary the scattering and absorbing intensity of copper nanoparticles when used in energy harvesting/conversion and optical devices.
研究领域:
纳米材料
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材料科学
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光学器件
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能量收集
✓ 已验证
DOI
高影响因子
ACS Applied Materials & Interfaces
·
2022
·
IF 10.383
Yan Yu,Zhenyu Hu,Shui-Yang Lien,Yaming Yu,Peng Gao
Thermoelectric (TE)-based gas sensors have attracted significant attention due to their high selectivity, low power consumption, and minimum maintenance requirements. However, it is challenging to find low-cost, environmentally friendly materials and simple device fabrication processes for large-scale applications. Herein, we report self-powered thermoelectric hydrogen (TEH) sensors based on bismuth sulfide (Bi2S3) fabricated from a low-cost Bi2S3 TE layer and platinum (Pt) catalyst. When working at room temperature, the monomorphic-type TEH sensor obtained an output response signal of 42.2 μV with a response time of 17 s at a 3% hydrogen atmosphere. To further improve device performance, we connected the patterned Bi2S3 films in series to increase the Seebeck coefficient to −897 μV K–1. For comparison, the resulting N tandem-type TEH sensor yielded a distinguished output voltage of 101.4 μV, which was greater than the monomorphic type by a factor of 2.4. Significantly, the response and recovery time of the N-tandem-type TEH sensor to 3% hydrogen were shortened to 14 and 15 s, respectively. This work provides a simple, environmentally friendly, and low-cost strategy for fabricating high-performance TEH sensors by applying low-cost Bi2S3 TE materials.
研究领域:
材料科学
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传感器与执行器
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能量收集
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纳米材料
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气体传感技术
✓ 已验证
DOI
高影响因子
危险品化学品经营许可证（带存储）