Energy Technology
·
2022
·Vol. 11
·期 11
·2200376
·
IF 4.149
Peng Xu,Decheng Zhao,Shupei Liu,Jinghui Ren,Jian Zhou,Ning Wang,Zhoulu Wang,Xiang Liu,Yutong Wu,Yi Zhang
Selenium cathodes are expected to become next-generation energy storage materials due to their high electronic conductivity and volumetric capacity. However, their commercial applications are hindered by polyselenides dissolution and low Se utilization. Herein, a biomass compound, namely lychee seed, is used as a sustainable precursor to design hierarchically porous carbon by a single-step carbonization activation method. With a unique hierarchical porous structure, the lychee seed–derived activated carbon (LSDAC) used to encapsulate selenium delivers a reversible capacity of 446 mA h g −1 at 2 C and 291 mA h g −1 at 5 C after 1000 cycles. The Se/LSDAC electrodes show the most favorable fast-charging and good cycling behavior compared to the previously reported biomass-based carbon materials. By increasing the Se area loading to 9.5 mg cm −2 , the Se/LSDAC cathode maintains an areal capacity of 3.7 mA h cm −2 (3.2 mA cm −2 areal current density) after 80 cycles. High Se loading and economical and fast-charging cathode designs in Li–Se batteries are inspired.
研究领域:
电化学储能
·
材料科学
·
纳米能源材料
·
可持续能源技术
·
先进电池技术
✓ 已验证
DOI
高影响因子
CERAMICS INTERNATIONAL
·
2023
·Vol. 50
·期 4
·6598-6605
·
IF 5.2
Wei Peng,Jianglei Chang,Bin Wang,Zhen Liu,Genshui Wang,Shuxiang Dong
The ultrahigh piezoelectric coefficient (d 33 ≥ 1000 pC/N) exhibited by piezoelectric Pb(Zr,Ti)O 3 (PZT) ceramics not only captivates researchers but also holds considerable practical value across various applications. While significant progress has been made in enhancing piezoelectricity of PZT-based ceramics, novel mechanisms need to be proposed to explain the piezoelectric behavior of new systems with ultrahigh d 33 . In this study, we initially employ LiNbO 3 as an additive to enhance the piezoelectric properties of the Pb(Ni 1 / 3 Nb 2 / 3 )O 3 –PbZrO 3 –PbTiO 3 ceramics. and the optimal performance is achieved by incorporating 1.5 mol% of LiNbO 3 into the system, resulting in an ultrahigh d 33 ∼1178 pC/N ( d 33 * ∼1560 p.m./V (@ E = 5 kV/cm)). The corresponding mechanism for this superior piezoelectric response involves the AB-site co-doping effect, especially the ( Li Pb ′ − Nb Zr / Ti ∙ ) defect dipoles formed by the introduction of LiNbO 3 . In particular, the addition of LiNbO 3 leads to a more uniform distribution of domain sizes, thereby further enhancing the ultrahigh piezoelectricity. These findings pave the way for a deeper under-standing of the origin of ultrahigh piezoelectric properties and make substantial contributions to the advancement of piezoelectric materials for practical applications in electromechanical devices.
研究领域:
材料科学
·
功能陶瓷
·
压电材料
·
固态物理
·
电子显微学
·
介电材料
·
无机非金属材料
✓ 已验证
DOI
高影响因子
Journal of Energy Chemistry
·
2017
·Vol. 27
·期 2
·413-418
·
IF 2.594
Yanyun Zhang,Xichuan Yang,Weihan Wang,Xiuna Wang,Licheng Sun
X1 (MeO-TPD) is an inexpensive and easily synthesized π -conjugated molecule that has been used as a hole-transport material (HTM) in solid-state dye-sensitized solar cells (ssDSSCs), achieving relatively high efficiency. In this paper, we characterize the physicochemical properties of 2,3-dichloro-5,6-dicyano-1,4-benzoquinone (DDQ) and show that it is a promising p-dopant in a spin-coating solution with X1 as the HTM. The doped ssDSSCs showed an increase in short-circuit current density from 5.38 mA cm –2 to 7.39 mA cm –2 , and their overall power conversion efficiency increased from 2.9% to 4.3%. Also, ssDSSCs with DDQ-doped X1 were more stable than the undoped samples, demonstrating that DDQ can act as a p-type dopant in X1 as an HTM for highly efficient, stable ssDSSCs.
研究领域:
材料科学
·
能源化学
·
光伏技术
·
纳米材料
·
半导体器件
·
表面化学
·
电化学
✓ 已验证
DOI
高影响因子
ELECTROCHIMICA ACTA
·
2011
·
IF 3.65
Yonghai Song,Zhifang He,Haozhi Zhu,Haoqing Hou,Li Wang
Cobalt nanoparticles (Co NPs) attached to graphene modified glassy carbon electrode (GCE) were prepared by electrodepositing. Atomic force microscopy image showed that many Co NPs with relative homogeneous size were formed and uniformly dispersed on the graphene/GCE. X-ray diffraction spectrum showed the as-prepared Co NPs was of the cubic phase of metal Co. The electrochemical behavior and electrocatalytic performances of the Co NPs/graphene/GCE towards the oxidation of cysteine and N-acetyl cysteine were evaluated by cyclic voltammograms, chronoamperometry and amperometric method . These results showed a good electrocatalytic activity for the two amino acids . The good catalytic activity , high sensitivity and well stability made this Co NPs/graphene/GCE to be a promising electrode for constructing a nonenzymatic sensor.
研究领域:
电分析化学
·
纳米生物技术
·
生物传感器
·
电化学传感
·
分子诊断
✓ 已验证
DOI
高影响因子
PHYSICAL CHEMISTRY CHEMICAL PHYSICS
·
2011
·Vol. 13
·期 20
·9232-9237
·
IF 3.454
Jingjie Cui,Dehui Sun,Weijia Zhou,Hong Liu,Peiguang Hu,Na Ren,Haiming Qin,Zhen Huang,Jianjian Lin,Houyi Ma
Two kinds of TiO2 nanobelts were prepared from commercial P-25 powders via an alkaline hydrothermal method with and without an acid etching process. The uncauterized nanobelts (TNs) exhibited a smooth surface, and mixed phases of anatase and TiO2 (B), whereas the cauterized ones (CTNs) displayed a rough surface and a pure anatase structure. TNs and CTNs were then deposited onto a glassy carbon electrode (GCE) surface with a conductive adhesive (CA), and the resulting chemically modified electrodes exhibited electrocatalytic activities in the oxidation of nucleobases in a 0.1 M phosphate buffer solution (PBS) at pH 7.4. For guanine and adenine, well-defined oxidation peaks were observed in voltammetric measurements at about +0.62 and +0.89 V, respectively, at a potential sweep rate of 100 mV s−1, whereas for cytosine, uracil and thymine, the voltammetric features were not obvious. The average surface coverages (Γ) of guanine and adenine on the CTNs/CA/GCE electrode were estimated to be 4.75 × 10−10 and 7.44 × 10−10 mol cm−2, respectively, which were about twice those at the TNs/CA/GCE electrode. The enhanced activity of the CTN-based electrode towards purine nucleobase oxidation was ascribed to the large specific surface area and anatase structures with enhanced (001) facets of the CTN that facilitated adsorption of the analytes onto the electrode surface and charge transport through the electrode surface layer.
研究领域:
分析化学
·
纳米材料科学
·
电化学
·
生物传感
·
分子生物学
·
生物医学工程
✓ 已验证
DOI
高影响因子
SEPARATION AND PURIFICATION TECHNOLOGY
·
2020
·
IF 5.774
Longqian Xu,Yu Xie,Yang Zong,Yunfeng Mao,Bing Zhang,Huaqiang Chu,Deli Wu
Carbon resource recovery from toxic organic wastewater to reduce unnecessary energy loss and greenhouse gas emissions is rarely pursued. In the present study, a promising approach for formic acid (FA) recovery from EDTA wastewater was proposed by coupling ozonation and flow-electrode capacitive deionization (Ozo/FCDI). In the ozonation process, a FA productivity of 25% was obtained with the complete degradation of EDTA. The FA recovery from wastewater was compared under electrodialysis (i.e., without the use of flowable carbon electrodes, 0 wt%) and FCDI (i.e. using 5 wt% flowable carbon electrodes) processes and the results demonstrated the superiority of the FCDI process. After 390 min of operation, the accumulated FA concentration in the anode chamber of the FCDI system had increased to 633.6 mg/L with a low energy consumption of 8.0 kWh/kg FA, which was 1.8 times of the FA concentration in the electrodialysis (ED) process and nearly 6.4 times in the feed stream. These findings suggest the effective acquisition of high value-added FA in the Ozo/FCDI system; may provide new opportunities and challenges for the recovery of organic compounds.
研究领域:
环境工程
·
废水处理
·
资源回收
·
电化学工程
·
可持续化学
·
污染控制化学
✓ 已验证
DOI
高影响因子
SOLID STATE IONICS
·
2018
·
IF 2.751
Wenping Zha,Yinghui Xu,Fei Chen,Qiang Shen,Lianmeng Zhang
In this work, Li 7 La 3 Zr 2 O 12 (LLZO)-based membrane electrolyte, which has good flexibility and can be easily mass-produced, is proposed to address the intrinsic defects of ceramic electrolytes . The LLZO-based membrane electrolyte is electrochemically stable in the voltage range of 0–5.2 V vs. Li/Li + due to the good oxidative stability of LLZO. We also develop a simple and low-cost approach to fabricate the all-solid-state lithium battery (ASSLB). Wet coating and hot pressing are applied to form a continuous and homogeneous electrolyte layer on a cathode layer. Thanks to the integrated preparation process, there is no obvious interface between the cathode layer and the electrolyte layer, hence reducing the interface resistance. The Li/LiFePO 4 batteries exhibit desirable cycling performance at 60 °C, which deliver a maximum discharge specific capacity of 151.6 mAh·g −1 at 0.1C and maintain 97.8% of the capacity after 50 cycles.
研究领域:
材料科学
·
电化学
·
能源存储
·
固态离子学
·
先进电池技术
✓ 已验证
DOI
高影响因子
RSC Advances
·
2018
·Vol. 8
·期 44
·24900-24905
·
IF 2.936
Yanjie Wang,Chun Fang,Ying Huang,Qing Liu,Ruirui Zhao,Xuli Ding,Yunhui Huang
Organic compounds have been utilized in rechargeable batteries as electrode materials on account of their designable structures and reversible redox properties. However, most of them suffer from problems with dissolution resulting in poor electrochemical performance. In this work, we adapt a sodium salt of tetracyanoquinodimethane (NaTCNQ) to work as a high redox potential cathode material in sodium ion batteries (SIBs). A porous carbon coated separator is demonstrated to be an adsorption layer and prevents the dissolved active material from migrating to the anode side. The NaTCNQ cell assembled with a carbon layer containing 5% activated carbon (AC) exhibits a higher initial capacity and greatly improved cycling stability. Using a conductive adsorption layer in organic redox batteries is a promising pathway to develop high performance organic electrode materials for SIBs.
研究领域:
电化学
·
能源材料
·
纳米材料
·
电池技术
·
功能材料
✓ 已验证
DOI
高影响因子
Frontiers of Optoelectronics
·
2019
·Vol. 11
·期 4
·348-359
·
IF 0
Liu Jikang,Li Junli,Tu Guoli
The electron transport layer (ETL) plays a crucial role on the electron injection and extraction, resulting in balanced charge transporting and reducing the interfacial energy barrier. The interface compatibility and electrical contact via employing appropriate buffer layer at the surface of hydrophobic organic active layer and hydrophilic inorganic electrode are also essential for charge collections. Herein, an ether chain functionalized fullerene derivatives [6,6]-phenyl-C 61 -butyricacid-(3,5-bis(2-(2-ethoxyethoxy)-ethoxy)-phenyl)-methyl ester (C 60 -2EPM) was developed to modify zinc oxide (ZnO) in inverted structure organic solar cells (OSCs). The composited ZnO/C 60 -2EPM interface layer can help to overcome the low interface compatibility between ZnO and organic active layer. By introducing the C 60 -2EPM layer, the composited fullerene derivatives tune energy alignment and accelerated the electronic transfer, leading to increased photocurrent and power conversion efficiency (PCE) in the inverted OSCs. The PCE based on PTB7-Th: PC 71 BM was enhance from 8.11% on bare ZnO to 8.38% and 8.65% with increasing concentrations of 2.0 and 4.0 mg/mL, respectively. The fullerene derivatives C 60 -2EPM was also used as a third compound in P3HT:PC 61 BM blend to form ternary system, the devices with addition of C 60 -2EPM exhibited better values than the control device.
研究领域:
材料科学
·
光电化学
✓ 已验证
产品关联
DOI
ELECTROCHIMICA ACTA
·
2018
·
IF 5.116
Hedong Chen,Shaofeng Wang,Xiaojing Liu,Xianhua Hou,Fuming Chen,Hui Pan,Haiqing Qin,Kwok-ho Lam,Yingchun Xia,Guofu Zhou
The double-coated Si-based composite (nano-Si@carbon@void@graphene sheets) with the excellent electrochemical properties have been successfully designed and prepared via a spray drying method. The composite electrode at 0.1 A g −1 presents a high initial discharge/charge capacity of 2744.9/2389.8 mAh g −1 , representing high initial coloumbic efficiency of 87.1%. After 200 cycles, a high charge capacity of 1325.2 mAh g −1 is obtained. Even at 0.8 A g −1 and 1.6 A g −1 , the composite electrode still maintain high capacities of 1466.1 mAh g −1 and 561.5 mAh g −1 , respectively. The enhanced performance is mainly attributed to the double-coated structure with void space resulting from the carbon layer and wrinkled graphene sheets . The three-dimensional network structure from carbon shell and graphene is capable of improving the electrical conductivity of the composite, buffering the significant volume expansion due to the intercalation and deintercalation of lithium-ions on the Si-based electrode, providing accommodation space for the volume changes and diffusion paths for lithium-ions. Furthermore, the part amorphous structure derived from the nano-silicon exhibits a cushioning effect on the electrode structure during the discharge/charge process of lithium-ion batteries.
研究领域:
材料科学
·
电化学
·
纳米科技
·
能源存储
·
功能材料
✓ 已验证
DOI
高影响因子
ELECTROCHIMICA ACTA
·
2018
·
IF 5.116
Chuankai Fu,Shuaifeng Lou,Yi Cao,Yulin Ma,Chunyu Du,Pengjian Zuo,Xinqun Cheng,Weiping Tang,Yongmin Wu,Yunzhi Gao,Hua Huo,Geping Yin
Recently, rechargeable lithium metal polymer battery (LMPB) attracts increasing attention because of its high safety and energy density properties. However, the high contact interfacial resistance of solid-state electrode and electrolyte is still an obstacle to satisfy the demand of high current density and long cycle stability, especially at room and lower temperature. Here, we develop a simple and efficient heat treatment method, to improve the interfacial compatibility between electrode and electrolyte in all-solid-state LMPB, successfully realizing workable LMPB at a reduced temperature (30 °C). The LMPB shows excellent cycling performance and rate capability in the voltage range of 2.5–4.2 V. The behavior of Li + plating/stripping on the surface of lithium metal anode is greatly enhanced. Meanwhile, the interfacial resistance of the LMPB decrease significantly after the heat treatment process .
研究领域:
材料科学
·
电化学
·
能源存储
·
固态电池
·
界面工程
✓ 已验证
DOI
高影响因子
CERAMICS INTERNATIONAL
·
2024
·Vol. 51
·期 8
·10774-10782
·
IF 5.1
Jitao Yi,Xinyue Zhang,Shanliang Chen,Ting Sun,Qinghui Jiang,Yong Liu
BiCuSeO-based materials show great promise for thermoelectric generators in waste heat recovery due to their excellent thermoelectric properties. However, the limited focus on device development has hindered their industrial-scale implementation. Here, high-performance BiCuSeO-based compounds with exceptional thermal stability were synthesized and remained stable aging for 400 h, making them suitable for investigation in the device bonding process. The BiCu80AgP is identified as the optimal solder from eight candidates, effectively connecting the copper (Cu) electrode with BiCuSeO-based compounds. The optimized bonding process substantially resulted in an impressive interfacial shear strength of about 15 MPa and reduced interfacial resistance to 2.2 mΩ cm 2 . Interface analysis revealed the formation of diverse, complex compounds, with variations in their concentrations greatly affecting joint performance. Achieving a uniform distribution of these compounds effectively mitigated thermal expansion mismatches and extended joint longevity by a factor of 6.6. This research proposes a novel fabrication method for BiCuSeO-based thermoelectric devices utilizing BCu80AgP solder, providing a foundation for future advancements in this field.
研究领域:
材料科学
·
热电转换
·
固态物理
·
能源材料
·
界面工程
✓ 已验证
DOI
高影响因子
危险品化学品经营许可证（带存储）