RSC Advances
·
2015
·Vol. 5
·期 60
·48946-48953
·
IF 3.84
Tingting Yu,Lifen Liu,Qiao Yang,Jing Song,Fenglin Yang
Using the flat module membrane electrodes based on polyester filter modified with polyaniline (PANI)–phytic acid (PA), a new type of membrane bio-reactor (MBR) system is developed for both bio-electrochemical electricity generation and effluent filtration. A specifically prepared carbon foam–Fe–Co catalyst was coated on the conductive, filterable cathode membrane which makes it catalytic for enhancing cathodic oxygen reduction reaction and electricity generation. The cell voltage (with carbon foam–Fe–Co, 0.5–0.4 V) is superior to control test 1 (without any catalyst, 0.2 V), moreover, it is even better than control test 2 (with Pt–C catalyst, 0.5–0.3 V). The corresponding maximum power density of carbon foam–Fe–Co is 38.5 and 2.4 times higher than control test 1 and 2, respectively. More importantly, the base electrode materials and catalyst were both low-cost. The overall removal efficiency of COD and NH4+–N are satisfactory, at 95% ± 2.5% and 85% ± 2.5%, respectively. This integrated system is easy to scale up for practical application in waste-water treatment and offers a better option in operating and coupling MBR with bio-electricity generation.
研究领域:
环境工程
·
环境微生物学
·
电化学工程
·
水处理技术
·
生物电化学系统
✓ 已验证
DOI
高影响因子
Journal of Energy Chemistry
·
2023
·
IF 13.1
Yiran Sun,Pengfei Zhou,Siyu Liu,Zhongjun Zhao,Yihao Pan,Xiangyan Shen,Xiaozhong Wu,Jinping Zhao,Junying Weng,Jin Zhou
P2-Na 0.67 Ni 0.33 Mn 0.67 O 2 (NNMO) is promising cathode material for sodium-ion batteries (SIBs) due to its high specific capacity and fast Na + diffusion rate. Nonetheless, the irreversible P2-O2 phase transformation, Na + /vacancy ordering, and transition metal (TM) dissolution seriously damage its cycling stability and restrict its commercialization process. Herein, Na occupation manipulation and interface stabilization are proposed to strengthen the phase structure of NNMO by synergistic Zn/Ti co-doping and introducing lithium difluorophosp (LiPO 2 F 2 ) film-forming electrolyte additive . The Zn/Ti co-doping regulates the occupancy ratio of Na e /Na f at Na sites and disorganizes the Na + /vacancy ordering, resulting in a faster Na + diffusion kinetics and reversible P2-Z phase transition for P2-Na 0.67 Ni 0.28 Zn 0.05 Mn 0.62 Ti 0.05 O 2 (NNZMTO). Meanwhile, the LiPO 2 F 2 additive can form homogeneous and ultrathin cathode-electrolyte interphase (CEI) on NNZMTO surface, which can stabilize the NNZMTO-electrolyte interface to prevent TM dissolution, surface structure transformation, and micro-crack generation. Combination studies of in situ and ex situ characterizations and theoretical calculations were used to elucidate the storage mechanism of NNZMTO with LiPO 2 F 2 additive. As a result, the NNZMTO displays outstanding capacity retention of 94.44% after 500 cycles at 1C with 0.3 wt% LiPO 2 F 2 , excellent rate performance of 92.5 mA h g −1 at 8C with 0.1 wt% LiPO 2 F 2 , and remarkable full cell capability. This work highlights the important role of manipulating Na occupation and constructing protective film in the design of layered materials, which provides a promising direction for developing high-performance cathodes for SIBs.
研究领域:
材料科学
·
电化学
·
能源存储
·
无机化学
·
固态化学
·
电池技术
✓ 已验证
DOI
高影响因子
DESALINATION
·
2023
·
IF 9.9
Xudong Bu,Yurong Zhang,Haiqing Guo,Sheng Wang,Xueyan Du
The ion removal capacity of carbon based capacitive deionization (CDI) is limited by the double-layer mechanism. Replacing one electrode of the conventional carbon-based symmetric CDI with a battery-like ion insertion material to obtain hybrid capacitive deionization (HCDI) can significantly improve the adsorption capacity . Various ion insertion materials have been adopted for HCDI, however, how to optimize the performance of the HCDI system by matching the two electrodes with different ions removal mechanism remains challenging. In this work, a HCDI desalination cell was demonstrated by using NaTi 2 (PO 4 ) 3 /reduced graphene oxide composites (NTP-rGO-700) as the cathode and activated carbon (AC) as the anode. Based on the mass balance strategy of electrodes and the electrochemical behavior of hybrid capacitors with different AC:NTP-rGO-700 mass ratios, the HCDI desalination cell was assembled with the optimal AC:NTP-rGO-700 mass ratio of 2:1. At an operating voltage of 1.6 V and a current density of 125 mA·g −1 , the specific adsorption capacity (SAC) of the HCDI cell can reach 51 mg·g −1 with an average salt adsorption rate (ASAR) of 2 mg·g −1 ·min −1 , and the energy consumption (E m ) is 136.53 kJ·mol −1 . This work provides an efficient approach for developing high performance HCDI cell.
研究领域:
环境科学
·
电化学
·
材料科学
·
水处理技术
·
能源存储
✓ 已验证
DOI
高影响因子
JOURNAL OF POWER SOURCES
·
2022
·
IF 9.794
Zhengjian Li,Sian Chen,Liting Cui,Haining Wang,Shanfu Lu,Yan Xiang
The acidic-alkaline interface of a bipolar membrane fuel cell (BPMFC) is the place to generate water, which significantly affect the output performance of BPMFC by regulating the water distribution due to the ion conductivity and oxygen reduction reaction (ORR) kinetics in cathode. To investigate the influence of water diffusivity ( D w ) on the water distribution, four alkaline polymer electrolytes with different D w is selected as anion exchange membrane or alkaline electrolyte ionomer to assemble BPMFCs. A combined experimental and simulated study reveals the positive correlation relationship of D w to the water distribution and performance of BPMFC. By increasing the D w of the alkaline polymer electrolytes, the interfacial-generated water amount can be increased and promptly transport to the cathode, thereby satisfying the ion conductivity and increasing the ORR kinetics, and breakthrough the peak power density of the BPMFC with 1.06 W cm −2 without humidification .
研究领域:
电化学
·
能源材料
·
燃料电池
·
高分子科学
·
界面科学
✓ 已验证
DOI
高影响因子
Small
·
2023
·Vol. 20
·期 14
·2306666
·
IF 13.3
Wuqi Liu,Wang Fu,Yaju Wei,Guoqiang Yu,Tao Wang,Lingbo Xu,Xiaoping Wu,Ping Lin,Xuegong Yu,Can Cui,Peng Wang
Carrier-selective passivating contacts using transition metal oxides (TMOs) have attracted great attention for crystalline silicon (c-Si) heterojunction solar cells recently. Among them, tantalum oxide (Ta 2 O 5 ) exhibits outstanding advantages, such as a wide bandgap, good surface passivation, and a small conduction band offset with c-Si, which is typically used as an electron-selective contact layer. Interestingly, it is first demonstrated that solution-processed Ta 2 O 5 films exhibit a high hole selectivity, which blocks electrons and promotes hole transport simultaneously. Through the ozone pre-treatment of Ta 2 O 5 /p-Si interface and optimization of the film thickness (≈9 nm), the interfacial recombination is suppressed and the contact resistivity is reduced from 178.0 to 29.3 mΩ cm 2 . Moreover, the Sn 4+ doping increases both the work function and oxygen vacancies of the film, contributing to the improved hole-selective contact performance. As a result, the photoelectric conversion efficiencies of Ta 2 O 5 /p-Si heterojunction solar cells are significantly improved from 14.84% to 18.47%, with a high thermal stability up to 300 °C. The work has provided a feasible strategy to explore new features of TMOs for carrier-selective contact applications, that is, bipolar carrier transport properties.
研究领域:
材料科学
·
光伏技术
·
半导体器件
·
表面物理
·
纳米材料
·
能源材料
✓ 已验证
DOI
高影响因子
Small
·
2019
·Vol. 15
·期 19
·1900484
·
IF 10.856
Xiaosheng Tang,Weiwei Chen,Zhengzheng Liu,Juan Du,Zhiqiang Yao,Yi Huang,Cheng Chen,Zhaoqi Yang,Tongchao Shi,Wei Hu,Zhigang Zang,Yu Chen,Yuxin Leng
All-inorganic semiconductor perovskite quantum dots (QDs) with outstanding optoelectronic properties have already been extensively investigated and implemented in various applications. However, great challenges exist for the fabrication of nanodevices including toxicity, fast anion-exchange reactions, and unsatisfactory stability. Here, the ultrathin, core–shell structured SiO 2 coated Mn 2+ doped CsPbX 3 (X = Br, Cl) QDs are prepared via one facile reverse microemulsion method at room temperature. By incorporation of a multibranched capping ligand of trioctylphosphine oxide, it is found that the breakage of the CsPbMnX 3 core QDs contributed from the hydrolysis of silane could be effectively blocked. The thickness of silica shell can be well-controlled within 2 nm, which gives the CsPbMnX 3 @SiO 2 QDs a high quantum yield of 50.5% and improves thermostability and water resistance. Moreover, the mixture of CsPbBr 3 QDs with green emission and CsPbMnX 3 @SiO 2 QDs with yellow emission presents no ion exchange effect and provides white light emission. As a result, a white light-emitting diode (LED) is successfully prepared by the combination of a blue on-chip LED device and the above perovskite mixture. The as-prepared white LED displays a high luminous efficiency of 68.4 lm W −1 and a high color-rendering index of Ra = 91, demonstrating their broad future applications in solid-state lighting fields.
研究领域:
材料科学
·
纳米技术
·
光电子学
·
半导体物理
·
固体照明
·
无机化学
·
功能材料
✓ 已验证
DOI
高影响因子
ORGANIC ELECTRONICS
·
2019
·
IF 3.495
Xin Qi,Ganghong Liu,Duo Wang,Ning Zhu,Yuqing Zhang,Zehao Zhang,Cuncun Wu,Xiangdong Li,Wei Luo,Yingqiang Li,Haozhe Hu,Zhijian Chen,Lixin Xiao,Shufeng Wang,Bo Qu
Interfacial modification as a feasible strategy to improve the properties of perovskite solar cells (PSCs) has been widely studied in recent years. In this work, PbCl 2 modification at the interface of SnO 2 /CH 3 NH 3 PbI 3 was used for CH 3 NH 3 PbI 3 -based planar PSCs. The introduction of PbCl 2 between SnO 2 and CH 3 NH 3 PbI 3 layers boosted the crystallization of perovskite film, which promoted the photovoltaic properties of corresponding PSCs. The open circuit voltage ( V OC ) and fill factor (FF) of the PbCl 2 -modified devices (1 mg/mL) were 1.11 V and 0.79, respectively, which were both higher than those of the reference devices without PbCl 2 (1.04 V and 0.76). Moreover, a steady-state power output efficiency exceeding 19% was obtained for the PbCl 2 -modified devices (1 mg/mL), which implied that PbCl 2 modification was an effective and low cost strategy for efficient PSCs.
研究领域:
材料科学
·
光伏技术
·
纳米科技
·
表面与界面工程
·
能源材料
·
半导体器件
·
功能材料
✓ 已验证
DOI
高影响因子
INTERNATIONAL JOURNAL OF HYDROGEN ENERGY
·
2017
·Vol. 42
·期 34
·22294-22301
·
IF 3.582
Jiang Li,Tianmu Lv,Nianjun Hou,Ping Li,Xueli Yao,Lijun Fan,Tian Gan,Yicheng Zhao,Yongdan Li
The effects of Mo doping into the B-site of La 0.3 Sr 0.7 TiO 3-δ perovskite on its ionic conductivity and catalytic activity as an anode material of solid oxide fuel cells have been investigated. The partial substitution of Ti by Mo reduces the bond energy between metal and oxygen ions in the perovskite. The concentration of Mo 5+ /Mo 6+ redox couples increases with the rise of the content of Mo, while the oxygen ionic conductivity decreases simultaneously. The doping of Mo significantly reduces the anodic polarization resistance and improves the performance of the single cell. The cell with La 0.3 Sr 0.7 Ti 0.97 Mo 0.03 O 3-δ anode and La 0.8 Sr 0.2 Ga 0.8 Mg 0.2 O 3-δ electrolyte exhibits a maximum power density of 135 mW cm −2 at 850 °C with hydrogen as fuel.
研究领域:
材料科学
·
电化学
·
能源材料
·
固态离子学
·
燃料电池技术
✓ 已验证
DOI
高影响因子
CERAMICS INTERNATIONAL
·
2024
·Vol. 50
·期 9
·15202-15208
·
IF 5.1
Xiong Huang,Pengfei Wang,Jianwei Zhao,Jun Yang,Zhenxiao Fu,Xiuhua Cao,Lei Zhang,Shuhui Yu,Rong Sun
As a dielectric material , BaTiO 3 -based ceramics are desirable for high performance ultra-thin multilayer ceramic capacitors (MLCCs) application. In this work, BaTiO 3 -based dielectric ceramics with superior dielectric properties were synthesized using a reducing atmosphere sintering process . It is found that the contribution of “wet" grain-boundary diffusion become significant as the oxygen partial pressure increases, resulting to a larger grain size and higher permittivity. Especially, for the specimen sintered in higher oxygen partial pressure , the stable temperature coefficient of capacitance (TCC) is dominated by irreversal domain due to the increase of super-lattice phase. Samples with higher oxygen partial pressure exhibit a higher permittivity of 2700 and better permittivity-temperature stability. Furthermore, ultra-thin MLCCs with thickness of 1 μm and capacitance of 10 μF and the TCC of X7R were successfully fabricated. This work provides a comprehensive explanation demonstrating upon the significant roles of grain size and defect engineering in the dielectric performance in BaTiO 3 -based ceramics, and points out an avenue to obtain excellent permittivity-temperature stability in ultra-thin MLCCs.
研究领域:
材料科学
·
电子陶瓷
·
介电材料
·
固态物理
·
功能陶瓷
·
电容器技术
✓ 已验证
DOI
高影响因子
Small
·
2020
·Vol. 16
·期 43
·2004614
·
IF 11.459
Xian Wang,Anrui Dong,Ziyi Zhu,Lulu Chai,Junyang Ding,Li Zhong,Ting-Ting Li,Yue Hu,Jinjie Qian,Shaoming Huang
In the preparation of nanomaterials, the kinetics and thermodynamics in the reaction can significantly affect the structures and phases of nanocrystals. Therefore, people are keen to adopt various synthetic strategies to accurately assemble the target nanocrystals, and reveal the underlying mechanism of the formation of specific structures. In this work, the total reaction time is adjusted to let the prepared MnCo Prussian blue analogous (MnCoPBA) crystals show four evolving morphological changes at different stages with the assistance of sodium dodecyl sulfate. Furthermore, it is clearly observed that the epitaxial growth along the (100) plane on the shell of MnCoPBA nanocrystals is favored, and the thermodynamics and kinetics in the morphology change process are analyzed in detail. Through the simple pyrolysis, MnCoPBA crystals can be successfully converted into the corresponding carbon composites, of which Mn 2 Co 2 C nanoparticles are evenly distributed in highly graphitized carbon matrix. Among them, PBA-III-700 performs good oxygen reduction reaction performance in alkaline solution with the half-wave potential of 0.801 V and diffusion-limited current density of 5.36 mA cm −2 , and its zinc-air battery exhibits the peak power density of 103.4 mW cm −2 competitive with commercial Pt/C.
研究领域:
材料化学
·
纳米科学与技术
·
电化学
·
能源材料
·
无机功能材料
✓ 已验证
DOI
高影响因子
PHYSICA STATUS SOLIDI A-APPLICATIONS AND MATERIALS SCIENCE
·
2024
·Vol. 221
·期 16
·2400342
·
IF 1.9
Jian Cheng,Xin Liu,Weichang Kong,Qingzheng Lei,Zhiyu Yu,Dun Liu
The fabrication of flexible electronics has gained extensive attention due to the growing demand of flexible devices. Among various methods, laser direct writing technology has emerged as a promising approach due to its advantages of high processing accuracy and simplicity. This research focuses on the preparation of copper microelectrodes using laser-induced reduction of CuO nanoparticles (Cu NPs) on polyethylene terephthalate films. First, the influence of various parameters on the conductivity of the copper microelectrodes is investigated. Second, flexible copper microelectrodes with a minimum resistivity of 62.29 μΩ cm and an adhesion grade of 4B level are successfully fabricated. Building upon these results, a capacitive pressure sensor is developed with optimal sensitivity of 3.99 Pa −1 , good hysteresis of 3.99%, and response and recovery times of 1.2 and 1.3 s, respectively. Repeatability tests confirm the sensor's stability and fatigue resistance. This research provides valuable insights for the production of flexible sensors.
研究领域:
生物医学工程
·
柔性电子学
·
传感器技术
·
纳米材料
·
微纳加工
·
可穿戴设备
✓ 已验证
DOI
高影响因子
POLYMERS FOR ADVANCED TECHNOLOGIES
·
2015
·Vol. 26
·期 8
·953-959
·
IF 1.757
Shuting Wang,Lan Cen,Qihao Wu
Maleated glycidyl 3-pentadecenyl phenyl ether with styrene (MGS) was synthesized from glycidyl 3-pentadecenyl phenyl ether (GPPE), maleic anhydride (MAH) and styrene (St) in the presence of AIBN initiator at 80°C, and then the resultant MGS was applied as a compatibilizer to prepare SBR/silica composites. Meanwhile, the commercial compatibilizer bis-(triethoxysilylpropyl) tetrasulfide (named Si69) added into composite was also prepared for comparison purpose. The synthetic MGS structure was characterized by GPC and FTIR, and SBR/silica compounds with different compatibilizer were analyzed using RPA, DMA and so on. The results showed that M̄n and M̄w of MGS were 19,538 g/mol and 23,790 g/mol, respectively. The curing time of compounds with MGS increased, whereas the maximum and minimum torques decreased. The addition of MGS decreased Payne effect of SBR/silica compounds, which implied an improvement of silica dispersion in the compounds. Bound rubber content of compound with MGS was about 1.7 times higher than the absence and 1.5 times higher than that with Si69. The tensile strength of the composites was improved by increasing compatibilizer loading, and the optimum value was observed at 6 phr of MGS. Meanwhile the use of MGS can improve the anti-aging property of composite. According to DMA, the tanδ value at 0°C of composite with MGS was higher than composite without compatibilizer suggesting that MGS can improve the wet skid resistance of composite. The SEM analysis revealed that introduction of MGS enhanced the compatibility between SBR and silica. Copyright © 2015 John Wiley & Sons, Ltd.
研究领域:
高分子化学
·
橡胶复合材料
·
材料界面科学
·
功能高分子
·
聚合物改性
✓ 已验证
DOI
高影响因子
危险品化学品经营许可证（带存储）