Organic soft actuators are of special interest in many fields including intravascular neurosurgery. Ion conductive polymer film （ICPF） actuators have been one of the strong candidates. The ICPF investigated here was...Organic soft actuators are of special interest in many fields including intravascular neurosurgery. Ion conductive polymer film （ICPF） actuators have been one of the strong candidates. The ICPF investigated here was a cation-exchange membrane （Nation 117, Du Pont）. When a voltage is given between the metal eIectrodes of an ICPF actuator, the ICPF actuator bends in the water due to the motion of Li＋ cations with associated water. In order to increase the freedom of the deformation of the ICPF actuator, structures of independent electrode pairs were proposed. The electrodes were selectively deposited by non-electrokvzed plating including the Pt [（NH3）6]^4＋ deposition process in a [Pt（NH3）6]Cl4 solution and the reduction process in a NaBH4 solution. Here, an elastomer adhesive tape with a fine electrode patterns was used performances were reported in detail. as a mask. The actuators processing conditions and their actuator展开更多
Development of uric acid sensor based on molecularly imprinted polymer （MIP） was studi ed. The sensor was developed by coating the imprinted polymethacrylic acid on the surface of a hanging mercury drop ele, ctrode ...Development of uric acid sensor based on molecularly imprinted polymer （MIP） was studi ed. The sensor was developed by coating the imprinted polymethacrylic acid on the surface of a hanging mercury drop ele, ctrode （HMDE） at -1 V （vs. Ag/AgCI） during 60 s. Uric acid was accumulated on the modified electrode at -1 V （vs. Ag/AgC1） during 60 s in acetate buffer pH = 5 and stripped at scan rate of 59 mV/s. Oxidation of uric acid on the surface of modified electrode is irreversible through the diffusion controlled process and polymethacrylic acid is a non-electrical conducting polymer. The current signal obtained from Ehe analysis of uric acid by using HMDE is higher than that of the HMD-palymethacrylic acid （polyMAA）, HMD-MIP and HMD-non imprinted polymer （NIP） electrode. The HMD-MIP has demonstrated its performance as a sensitive voltammetric sensor for uric acid. The modified electrode has been tested for the determination of uric acid in the serum sample with recovery percentage of 95.7% （n = 2）. The limit of detection obtained was 6.0 x 10-10 M.展开更多
3-Hydroxy-1-propanesulfonic acid(HPSA)was applied as a modification layer on poly(3,4-ethylenedioxythiophene):poly(styrene sulfonate)(PEDOT:PSS)film via spin-coating,resulting in a massive boost of the conductivity of...3-Hydroxy-1-propanesulfonic acid(HPSA)was applied as a modification layer on poly(3,4-ethylenedioxythiophene):poly(styrene sulfonate)(PEDOT:PSS)film via spin-coating,resulting in a massive boost of the conductivity of PEDOT:PSS film,and thus the as-formed PEDOT:PSS/HPSA bilayer film was successfully used as a transparent electrode for ITO-free polymer solar cells(PSCs).Under the optimized concentration of HPSA(0.2 mol L^(-1)),the PEDOT:PSS/HPSA bilayer film has a conductivity of 1020 S cm^(-1),which is improved by about 1400 times of the pristine PEDOT:PSS film(0.7 S cm^(-1)).The sheet resistance of the PEDOT:PSS/HPSA bilayer film was 98Ωsq^(-1),and its transparency in the visible range was over 80%.Both parameters are comparable to those of ITO,enabling its suitability as the transparent electrode.According to atomic force microscopy(AFM),UV-Vis and Raman spectroscopic measurements,the conductivity enhancement was resulted from the removal of PSS moiety by methanol solvent and HPSA-induced segregation of insulating PSS chains along with the conformation transition of the conductive PEDOT chains within PEDOT:PSS.Upon applying PEDOT:PSS/HPSA bilayer film as the transparent electrode substituting ITO,the ITO-free polymer solar cells(PSCs)based on poly[N-9″-hepta-decanyl-2,7-carbazole-alt-5,5-(4′,7′-di-2-thienyl-2′,1′,3′-benzothiadiazole)]:[6,6]-phenyl C71-butyric acid methyl ester(PC_(71)BM)(PCDTBT:PC_(71)BM)active layer exhibited a power conversion efficiency(PCE)of 5.52%,which is comparable to that of the traditional ITO-based devices.展开更多
Aluminum-ion batteries(AIBs)are a type of promising energy storage device due to their high capacity,high charge transfer efficiency,low cost,and high safety.However,the most investigated graphitic and metal dichalcog...Aluminum-ion batteries(AIBs)are a type of promising energy storage device due to their high capacity,high charge transfer efficiency,low cost,and high safety.However,the most investigated graphitic and metal dichalcogenide cathodes normally possess only a moderate capacity and a relatively low cycling stability,respectively,which limit the further development of high-performance AIBs.Here,based on the results of first principles calculations,we developed a polyaniline/graphene oxide composite that exhibited outstanding performances as a cathode material in AIBs(delivering 180 mA h g^−1 after 4000 cycles),considering both the discharge capacity and the cycling performance.Ex-situ characterizations verified that the charge storage mechanism of polyaniline depended on the moderate interactions between−NH in the polyaniline chain and the electrolyte anions,such as AlCl4^−.These findings lay the foundation of the development of high-performance AIBs based on conducting polymers.展开更多
The development of high-performance solid polymer electrolytes is crucial for producing all-solid-state lithium metal batteries with high safety and high energy density.However,the low ionic conductivity of solid poly...The development of high-performance solid polymer electrolytes is crucial for producing all-solid-state lithium metal batteries with high safety and high energy density.However,the low ionic conductivity of solid polymer electrolytes and their unstable electrolyte/electrode interfaces have hindered their widespread utilization.To address these critical challenges,a strong Lewis acid(aluminum fluoride(AIF_(3)))with dual functionality is introduced into poly(ethylene oxide)(PEO)-based polymer electrolyte.The AlF;facilitates the dissociation of lithium salt,increasing the iontransfer efficiency due to the Lewis acid-base interaction;further the in-situ formation of lithium fluoride-rich interfacial layer is promoted,which suppresses the uneven lithium deposition and continuous undesired reactions between the Li metal and PEO matrix.Benefiting from our rational design,the symmetric Li/Li battery with the modified electrolyte exhibits much longer cycling stability(over 3600 h)than that of the pure PEO/lithium bis(trifluoromethanesulfonyl)imide(LiTFSI)electrolyte(550 h).Furthermore,the all-solid-state LiFeP04 full cell with the composite electrolyte displays a much higher Coulombic efficiency(98.4%after 150 cycles)than that of the electrolyte without the AlF;additive(63.3%after 150 cycles)at a large voltage window of 2.4-4.2 V,demonstrating the improved interface and cycling stability of solid polymer lithium metal batteries.展开更多
文摘Organic soft actuators are of special interest in many fields including intravascular neurosurgery. Ion conductive polymer film （ICPF） actuators have been one of the strong candidates. The ICPF investigated here was a cation-exchange membrane （Nation 117, Du Pont）. When a voltage is given between the metal eIectrodes of an ICPF actuator, the ICPF actuator bends in the water due to the motion of Li＋ cations with associated water. In order to increase the freedom of the deformation of the ICPF actuator, structures of independent electrode pairs were proposed. The electrodes were selectively deposited by non-electrokvzed plating including the Pt [（NH3）6]^4＋ deposition process in a [Pt（NH3）6]Cl4 solution and the reduction process in a NaBH4 solution. Here, an elastomer adhesive tape with a fine electrode patterns was used performances were reported in detail. as a mask. The actuators processing conditions and their actuator
文摘Development of uric acid sensor based on molecularly imprinted polymer （MIP） was studi ed. The sensor was developed by coating the imprinted polymethacrylic acid on the surface of a hanging mercury drop ele, ctrode （HMDE） at -1 V （vs. Ag/AgCI） during 60 s. Uric acid was accumulated on the modified electrode at -1 V （vs. Ag/AgC1） during 60 s in acetate buffer pH = 5 and stripped at scan rate of 59 mV/s. Oxidation of uric acid on the surface of modified electrode is irreversible through the diffusion controlled process and polymethacrylic acid is a non-electrical conducting polymer. The current signal obtained from Ehe analysis of uric acid by using HMDE is higher than that of the HMD-palymethacrylic acid （polyMAA）, HMD-MIP and HMD-non imprinted polymer （NIP） electrode. The HMD-MIP has demonstrated its performance as a sensitive voltammetric sensor for uric acid. The modified electrode has been tested for the determination of uric acid in the serum sample with recovery percentage of 95.7% （n = 2）. The limit of detection obtained was 6.0 x 10-10 M.
基金supported by the National Key Research and Development Program of China (2017YFA0402800)the National Natural Science Foundation of China (51403005, 51572254, 11604279)+3 种基金the Major/Innovative Program of Development Foundation of Hefei Center for Physical Science and Technology (2016FXZY003)Key Technologies R&D Program of He’nan Province (172102210459)Foundation of He’nan Educational Committee (16A430027)Nanhu Scholars Program for Young Scholars of Xinyang Normal University
文摘3-Hydroxy-1-propanesulfonic acid(HPSA)was applied as a modification layer on poly(3,4-ethylenedioxythiophene):poly(styrene sulfonate)(PEDOT:PSS)film via spin-coating,resulting in a massive boost of the conductivity of PEDOT:PSS film,and thus the as-formed PEDOT:PSS/HPSA bilayer film was successfully used as a transparent electrode for ITO-free polymer solar cells(PSCs).Under the optimized concentration of HPSA(0.2 mol L^(-1)),the PEDOT:PSS/HPSA bilayer film has a conductivity of 1020 S cm^(-1),which is improved by about 1400 times of the pristine PEDOT:PSS film(0.7 S cm^(-1)).The sheet resistance of the PEDOT:PSS/HPSA bilayer film was 98Ωsq^(-1),and its transparency in the visible range was over 80%.Both parameters are comparable to those of ITO,enabling its suitability as the transparent electrode.According to atomic force microscopy(AFM),UV-Vis and Raman spectroscopic measurements,the conductivity enhancement was resulted from the removal of PSS moiety by methanol solvent and HPSA-induced segregation of insulating PSS chains along with the conformation transition of the conductive PEDOT chains within PEDOT:PSS.Upon applying PEDOT:PSS/HPSA bilayer film as the transparent electrode substituting ITO,the ITO-free polymer solar cells(PSCs)based on poly[N-9″-hepta-decanyl-2,7-carbazole-alt-5,5-(4′,7′-di-2-thienyl-2′,1′,3′-benzothiadiazole)]:[6,6]-phenyl C71-butyric acid methyl ester(PC_(71)BM)(PCDTBT:PC_(71)BM)active layer exhibited a power conversion efficiency(PCE)of 5.52%,which is comparable to that of the traditional ITO-based devices.
基金financially supported by the National Natural Science Foundation of China (51877216 and 21773309)Taishan Scholar Foundation (tsqn20161017)+1 种基金the Major Program of Shandong Province Natural Science Foundation (ZR201801280009)the Fundamental Research Funds for the Central Universities(18CX05007A,19CX05001A and 19CX05002A)
文摘Aluminum-ion batteries(AIBs)are a type of promising energy storage device due to their high capacity,high charge transfer efficiency,low cost,and high safety.However,the most investigated graphitic and metal dichalcogenide cathodes normally possess only a moderate capacity and a relatively low cycling stability,respectively,which limit the further development of high-performance AIBs.Here,based on the results of first principles calculations,we developed a polyaniline/graphene oxide composite that exhibited outstanding performances as a cathode material in AIBs(delivering 180 mA h g^−1 after 4000 cycles),considering both the discharge capacity and the cycling performance.Ex-situ characterizations verified that the charge storage mechanism of polyaniline depended on the moderate interactions between−NH in the polyaniline chain and the electrolyte anions,such as AlCl4^−.These findings lay the foundation of the development of high-performance AIBs based on conducting polymers.
基金supported by the research fund of Shenzhen Science and Technology Innovation Committee(SGDX20201103093600003)the University of Macao,Macao SAR(MYRG2018-00079-IAPME and MYRG2019-00115-IAPME)+2 种基金the Science and Technology Development Fund,Macao SAR(0092/2019/A2,0059/2018/A2,and 009/2017/AMJ)the National Thousand Young Talent planthe National Natural Science Foundation of China(21875040&21905051)。
文摘The development of high-performance solid polymer electrolytes is crucial for producing all-solid-state lithium metal batteries with high safety and high energy density.However,the low ionic conductivity of solid polymer electrolytes and their unstable electrolyte/electrode interfaces have hindered their widespread utilization.To address these critical challenges,a strong Lewis acid(aluminum fluoride(AIF_(3)))with dual functionality is introduced into poly(ethylene oxide)(PEO)-based polymer electrolyte.The AlF;facilitates the dissociation of lithium salt,increasing the iontransfer efficiency due to the Lewis acid-base interaction;further the in-situ formation of lithium fluoride-rich interfacial layer is promoted,which suppresses the uneven lithium deposition and continuous undesired reactions between the Li metal and PEO matrix.Benefiting from our rational design,the symmetric Li/Li battery with the modified electrolyte exhibits much longer cycling stability(over 3600 h)than that of the pure PEO/lithium bis(trifluoromethanesulfonyl)imide(LiTFSI)electrolyte(550 h).Furthermore,the all-solid-state LiFeP04 full cell with the composite electrolyte displays a much higher Coulombic efficiency(98.4%after 150 cycles)than that of the electrolyte without the AlF;additive(63.3%after 150 cycles)at a large voltage window of 2.4-4.2 V,demonstrating the improved interface and cycling stability of solid polymer lithium metal batteries.
