|
|
|
题名
|
作者
|
年代
|
出处
|
被引量
|
| 1 | A stretchable triboelectric generator with coplanar integration design of energy harvesting and strain sensing显示文摘The rapid development of flexible triboelectric nanogenerators(TENGs)has become an alternative to batteries for wearable devices.Stretchable,multifunctional,and low-cost are the primary development directions for these wearable devices based on TENG.Herein,a stretchable triboelectric generator with coplanar integration was designed for energy harvesting and force sensing.The industrial conductive silicone and silicone were used to fabricate the TENG with a thickness of less than 0.9 mm.When the elongation was less than 150%,TENG exhibited excellent linear characteristics in the resistance-tensile strain correspondence,and the coefficient of determination was 0.99.This stretchable TENG with a sufficient contact area of 9 cm^(2) could generate a short-circuit current of 2μA when it was in contact with the skin.Lastly,an intelligent tension monitoring wearable device that can effectively measure the tensile force was developed.Such a stretchable,coplanar integration-based,and low-cost wearable device has excellent applicability in wearable electronics. | WU Bin ZHANG ZengXing XUE XiaoBin HAO CongCong ZHANG WenJun BI RuiYu WANG Qiang XUE ChenYang | 2022 | Science China(Technological Sciences)2022，65，1： | 3 |
| 2 | Coil-levitated hybrid generator for mechanical energy harvesting and wireless temperature and vibration monitoring显示文摘The development of wireless monitoring is currently restricted by the short lifetime of batteries,requiring frequent replacement.Utilization of abundant mechanical energy from the surrounding environment has attracted increasing attention in real-time monitoring.Herein,a coil-levitated hybrid generator was developed for the efficient harvesting of mechanical energy from mechanical motion.The novel coil-levitated structure adapted to the metal and magnetic environment.The output currents were systematically analyzed at different operation modes based on the unique combination of triboelectrification,electromagnetic induction,and piezoelectric effect.Under the excitation of vibration frequency and amplitude of 8 Hz and 5 mm respectively,the as-constructed triboelectric nanogenerator delivered a peak power density of 11.40 W/m3 at 10 MΩ.Meanwhile,the middle electromagnetic part and bottom piezoelectric generator provided peak power densities of 6.97 and 79.93 W/m2 at 10000Ω,respectively.More importantly,the battery charging experiment was verified,in which a 30 mA h Li-ion battery can be charged from 2.57 to 3.27 V in about 90 min.In sum,a self-powered temperature and vibration monitoring system was successfully developed based on hybrid generator,promising for realizing wireless monitoring of mechanical equipment without any external power supply. | XUE XiaoBin ZHANG ZengXing WU Bin HE ShanShan WANG Qiang ZHANG WenJun BI RuiYu CUI Juan ZHENG YongQiu XUE ChenYang | 2021 | Science China(Technological Sciences)2021，64，6： | 2 |
| 3 | Biochar and organic substitution improved net ecosystem economic benefit in intensive vegetable production显示文摘Biochar amendment and substituting chemical fertilizers with organic manure(organic substitution)have been widely reported to increase crop production and decrease reactive nitrogen(Nr)loss including nitrous oxide(N_(2)O),nitric oxide(NO),and ammonia(NH3)emissions,and N runoff and leaching.However,few comprehensive evalua-tions have been performed on the environmental and economic aspects of biochar amendment or organic sub-stitution.Here,we studied the comprehensive effects of biochar amendment,organic substitution,and biochar amendment combined with organic substitution on crop production,Nr loss,and net ecosystem economic benefit(NEEB)in intensive vegetable production by integrating life-cycle assessment for Nr footprints,empirical models for NH3 volatilization and N runoff and leaching derived from peer-reviewed publications and validated by the current measurements and direct field measurement for N_(2)O and NO emissions during 5 consecutive years of vegetable crop rotations.Five fertilization treatments were applied(SN:synthetic fertilizer application;SNB:SN plus 20 t ha^(−1)biochar amendment;SNM:substituting 50%of chemical N fertilizer with organic manure;SNMB:SNM plus 20 t ha^(−1)biochar amendment;and CK:no fertilizer or biochar addition).Compared with the SN,the SNB increased vegetable yield(28.4%,p<0.05;interannually varying from−10 to 74.9%)and nitrogen use efficiency(29.2%,interannually varying from−39.7 to 150.4%),and decreased field Nr loss(45.4%,p<0.01;interannually varying from−40.3 to 78.4%),and thus improved NEEB by 7.1%;meanwhile,the SNM increased vegetable yield(11.6%,interannually varying from−5.4 to 27.1%)and nitrogen use efficiency(45.7%,p<0.05;interannually varying from 2.3 to 154%),reduced field Nr loss(34.9%,p<0.01;interannually varying from 8.4-39.0%),and thus improved NEEB by 17.8%(p<0.05)compared to the SN,being 56.0×10^(3)Chinese Yuan(CNY)ha^(−1)crop^(−1).Due to the high foreground Nr loss during organic manure production and high input costs of biochar production,the SNMB decreased the NEEB by 8.0%as compared to the SN.Moreover,the SNB and SNM improved vegetable qualities by increasing protein,soluble sugar,and vitamin C contents while decreasing nitrate content(p<0.05).Therefore,single application of biochar amendment or organic substitution would achieve better NEEB and product quality in vegetable production. | Ruiyu Bi Qianqian Zhang Liping Zhan Xintong Xu Xi Zhang Yubing Dong Xiaoyuan Yan Zhengqin Xiong | 2022 | Biochar2022，4，1： | 0 |
您所在的机构暂未开通此部分的功能，请联系管理员