Small
·
2018
·Vol. 14
·期 21
·1704367
·
IF 9.598
Sheng Huang,Chao Meng,Min Xiao,Shan Ren,Shuanjin Wang,Dongmei Han,Yuning Li,Yuezhong Meng
Sodium ion batteries (SIB) are considered promising alternative candidates for lithium ion batteries (LIB) because of the wide availability and low cost of sodium, therefore the development of alternative sodium storage materials with comparable performance to LIB is urgently desired. The sodium ions with larger sizes resist intercalation or alloying because of slow reaction kinetics. Most pseudocapacitive sodium storage materials are based on subtle nanomaterial engineering, which is difficult for large-scale production. Here, ferroelectric Sn 2 P 2 S 6 with layered nanostructure is developed as sodium ion storage material. The ferroelectricity-enhanced pseudocapacitance of sodium ion in the interlayer spacing makes the electrochemical reaction easier and faster, endowing the Sn 2 P 2 S 6 electrode with excellent rate capability and cycle stability. Furthermore, the facile solid state reaction synthesis and common electrode fabrication make the Sn 2 P 2 S 6 that becomes a promising anode material of SIB.
研究领域:
材料科学
·
电化学
·
纳米科技
·
能源存储
·
固体化学
✓ 已验证
DOI
高影响因子
JOURNAL OF APPLIED ELECTROCHEMISTRY
·
2023
·Vol. 53
·期 12
·2411-2419
·
IF 2.9
Mai Manfang,Liao Bin,Liao Yijun,Lin Donghai,Ma Xinzhou
GaTe thin films are electrochemically deposited on indium tin oxide for photoelectrochemical applications. The electrochemical deposition behavior of GaTe thin films in acidic solution of HTeO 2 + with Ga 3+ is studied with cyclic voltammetry combining with operando transmittance spectroscopy. Underpotential deposition of Ga on Te starts at potential of − 0.35 V. The presence of Ga 3+ in the solution can strongly suppressed the formation of H 2 Te. XPS analysis reveals that Ga-rich GaTe is deposited over a wide potential range. The photoelectrochemical performance of the thin films as photocathodes is strongly dependent on the deposition potential. The GaTe films deposited at − 1.0 V produced the highest photocurrent of about − 0.03 mA cm −2 . Meanwhile the film deposited at − 0.35 V shows improved performance during photoelectrochemical measurement, which can be ascribed to the increased GaTe content during photoelectrochemical measurements, as confirmed by XPS analysis. Graphical
研究领域:
材料科学
·
电化学
·
半导体物理
·
光电功能材料
·
能源材料
·
表面科学
·
薄膜技术
✓ 已验证
DOI
高影响因子
NANO
·
2016
·
IF 0.951
Liang Yan,Zhicheng Li,Shaojun Zhang
In this study, a film of electrochemically reduced graphene oxide (ERGO) deposited onto a glassy carbon electrode (GCE) was prepared through the pulse potential method (PPM). The as-prepared film was characterized via scanning electron microscopy (SEM) and cyclic voltammetry (CV). The ERGO film was applied for the first time to develop a highly sensitive electrochemical sensor for imidacloprid determination. Results revealed that the ERGO film can effectively increase response towards imidacloprid reduction by significantly enhancing the reduction peak currents and decreasing the over potential of imidacloprid. Under optimum conditions, the modified electrode showed a linear voltammetric response to imidacloprid at concentrations ranging from 3 . 0 × 1 0 − 8 mol L − 1 to 1 . 1 × 1 0 − 6 mol L − 1 , with a detection limit of 1 . 0 × 1 0 − 8 mol L − 1 . The developed electrode is potentially a good candidate for imidacloprid determination. The proposed method provides a good recovery rate of imidacloprid in spiked practical samples, such as lake water and tap water.
研究领域:
分析化学
·
环境监测
·
电化学
·
农药残留检测
·
传感器技术
✓ 已验证
DOI
高影响因子
Frontiers in Chemistry
·
2021
·
IF 5.221
Zhaohuan Wei,Zhiyuan Zhang,Yaqi Ren,Hong Zhao
A high energy efficiency, low charging voltage cathode is of great significance for the development of non-aqueous lithium-oxygen batteries. Non-stoichiometric manganese dioxide (MnO2-x) and chromium trioxide (Cr2O3) are known to have good catalytic activities for the discharging and charging processes, respectively. In this work, we prepared a cathode based on Cr2O3 decorated MnO2-x nanosheets via a simple anodic electrodeposition-electrostatic adsorption-calcination process. This combined fabrication process allowed the simultaneous introduction of abundant oxygen vacancies and trivalent manganese into the MnO2-x nanosheets, with a uniform load of a small amount of Cr2O3 on the surface of the MnO2-x nanosheets. Therefore, the Cr2O3/MnO2-x electrode exhibited a high catalytic effect for both discharging and charging, while providing high energy efficiency and low charge voltage. Experimental results show that the as-prepared Cr2O3/MnO2-x cathode could provide a specific capacity of 6,779 mA·h·g−1 with a terminal charge voltage of 3.84 V, and energy efficiency of 78%, at a current density of 200 mA·g−1. The Cr2O3/MnO2-x electrode also showed good rate capability and cycle stability. All the results suggest that the as-prepared Cr2O3/MnO2-x nanosheet electrode has great prospects in non-aqueous lithium-oxygen batteries.
研究领域:
电化学
·
材料科学
·
能源存储
·
纳米材料
·
催化化学
✓ 已验证
DOI
高影响因子
Protection of Metals and Physical Chemistry of Surfaces
·
2020
·Vol. 56
·期 1
·180-188
·
IF 0.985
Li Min,Li Ying
— In this work, it found that zinc oxide (ZnO) and zinc chloride (ZnCl 2 ) can be dissolved well in 1-methylimidazolium trifluoromethylsulfonate (MIMTfO) ionic liquid with a high concentration (1.5 mol L −1 ). The electrochemical behavior of Zn(II) in MIMTfO ionic liquid containing ZnO or ZnCl 2 was investigated at 373 K. Cyclic voltammetry results indicated that the electrodeposition of zinc from both ZnO and ZnCl 2 is a one-step and two-electron reaction. Chronoamperometry studies revealed that the electrodeposition of zinc from both ZnO and ZnCl 2 is fit instantaneous nucleation, and the average values of the diffusion coefficient of Zn(II) were determined to be approximately 4.1 × 10 –8 cm 2 s –1 and 7.7 × 10 –9 cm 2 s –1 , respectively, at 373 K. The electrodeposition experiments were performed at 373 K and 383 K using potentiostatic electrolysis. The SEM images showed that dense and compact electrodeposits were obtained at 373 K in MIMTfO ionic liquid for both Zn(II) sources, and the EDS and XRD analysis confirmed that the obtained electrodeposits are metallic zinc.
研究领域:
电化学
·
材料科学
·
金属沉积
·
绿色溶剂
·
功能材料
✓ 已验证
DOI
高影响因子
International Journal of Electrochemical Science
·
2023
·Vol. 12
·期 5
·4610-4618
·
IF 1.5
Chenle Zhang,Libo Deng,Peixin Zhang,Xiangzhong Ren,Yongliang Li,Tingshu He
Electrocatalytic NiS 2 cubes were directly synthesized on F-doped tin oxide using a hydrothermal approach and used as counter electrode in dye-sensitized solar cells (DSSCs). The NiS 2 cubes displayed an excellent electrocatalytic activity in the reduction of I 3 − showing a power conversion efficiency of 5.56%, which is close to that of the Pt-containing DSSC (7.05%). Furthermore, the NiS 2 cubes showed a comparable stability to Pt. This is ascribed to the low resistance to diffusion and transfer of electrolyte ions. These results suggest that the NiS 2 cubes prepared through a facile process is a promising substitute to Pt electrode.
研究领域:
材料科学
·
能源化学
·
纳米材料
·
电化学
·
光伏器件
✓ 已验证
DOI
高影响因子
JOURNAL OF ELECTROANALYTICAL CHEMISTRY
·
2013
·
IF 2.672
Yinfeng Li,Lina Zou,Ge Song,Kunjing Li,Baoxian Ye
The electro-polymerization of l -Theanine was investigated for the first time on glassy carbon electrode and the polymeric conditions and mechanism were discussed in detail. Hereafter, a simple and sensitive electrochemical sensor based on the poly( l -Theanine) film was established for sophoridine sensing. The electrode process of sophoridine was then studied by cyclic voltammetry and its determination was achieved by amperometry . The results revealed that the poly( l -Theanine) membrane effectively decreased the oxidation potential of sophoridine and greatly increased its response current. And this sensor, fabricated easily and simply as well as very easy surface update, showed good response for sophoridine with a wide linear range from 1.0 × 10 −6 to 1.4 × 10 −4 mol L −1 and a low detection limit of 5 × 10 −7 mol L −1 . The application of proposed method in analysis of real sample was also evaluated with good performance. This work promoted the potential applications of amino acid materials in electrochemical sensors.
研究领域:
分析化学
·
电化学
·
药物分析
·
生物传感
·
分子诊断
·
药物代谢
✓ 已验证
DOI
高影响因子
ChemSusChem
·
2024
·Vol. 17
·期 24
·e202400840
·
IF 7.5
Ruojian Ma,Yaning Liu,Ruyi Fang,Jun Zhang,Ya-Hui Wang,Hui Huang,Yongping Gan,Xinping He,Xinhui Xia,Wenkui Zhang,Yang Xia,Sen Xin
Unfavorable parasitic reactions between the Ni-rich layered oxide cathode and the sulfide solid electrolyte have plagued the realization of all-solid-state rechargeable Li batteries. The accumulation of inactive by-products (P 2 S x , S, PO x n − and SO x n − ) at the cathode-sulfide interface impedes fast Li-ion transfer, which accounts for sluggish reaction kinetics and significant loss of cathode capacity. Herein, we proposed an easily scalable approach to stabilize the cathode electrochemistry via coating the cathode particles by a uniform, Li + -conductive plastic-crystal electrolyte nanolayer on their surface. The electrolyte, which simply consists of succinonitrile and Li bis(trifluoromethanesulphonyl)imide, serves as an interfacial buffer to effectively suppress the adverse phase transition in highly delithiated cathode materials, and the loss of lattice oxygen and generation of inactive oxygenated by-products at the cathode-sulfide interface. Consequently, an all-solid-state rechargeable Li battery with the modified cathode delivers high specific capacities of 168 mAh g −1 at 0.1 C and a high capacity retention >80 % after 100 cycles. Our work sheds new light on rational design of electrode-electrolyte interface for the next-generation high-energy batteries. Graphical A uniform plastic-crystal electrolyte nanolayer is coated onto the surface of Ni-rich oxide cathode particles and serves as a buffer to effectively suppress the adverse phase transition, loss of lattice oxygen and interfacial parasitic reactions with a sulfide solid electrolyte at highly delithiated cathode, which contributes improved electrochemical performance of an all-solid-stare rechargeable Li battery.
研究领域:
材料科学
·
电化学
·
能源存储
·
固体离子学
·
电池技术
✓ 已验证
DOI
高影响因子
ELECTROCHIMICA ACTA
·
2019
·
IF 5.383
Jingwei Wang,Guohua Chen,Shenhua Song
A sodium-ion conducting poly(vinyl alcohol)-based gel polymer electrolyte membrane is developed by plasticizing with an ionic liquid , for the fabrication of electric double-layer capacitors. Sodium triflate is selected as the sodium salt. 1-Ethyl-3 methylimidazoliumtrifluoromethanesulfonate is employed as the plasticizer . The properties of the electrolyte membranes are analyzed in terms of their crystallinity , morphology, thermal stability, electrochemical stability window, ionic transference number, and ionic conductivity . The composition with poly(vinyl alcohol) - 30% sodium triflate + 10% 1-ethyl-3 methylimidazoliumtrifluoromethanesulfonate shows the optimal performances such as good thermal stability up to 150 °C and wide electrochemical stability window of 4.70 V. It is thus employed in the fabrication of electric double-layer capacitors, serving as both ion-conducting electrolyte and separator. The capacitor shows almost 100% coulombic efficiency and stable charge-discharge cyclic property with almost 100% capacity retention after 1000 cycles, when charging up to 1.6 V and 2.0 V with a specific capacitance of 103.7 and 127.8 F g −1 , respectively. It compares well with that made of a liquid electrolyte . This excellent performance is attributed to the sodium triflate with large-sized anions and thus high ionic conductivity (3.8 × 10 −3 S cm −1 ) of the electrolyte membrane.
研究领域:
电化学
·
材料科学
·
能源存储
·
高分子科学
·
纳米科技
·
功能材料
✓ 已验证
DOI
高影响因子
JOURNAL OF MEMBRANE SCIENCE
·
2021
·
IF 8.742
Hao Jiang,Yueyue Wu,Jian Ma,Yongchao Liu,Lulu Wang,Xin Yao,Hongfa Xiang
Solid-state electrolyte for solid-state batteries is one of the current hotspots in the research field of high-safety and high energy density lithium metal batteries . This work reports a polymer-in-ceramic and ceramic-in-polymer bilayer ultrathin (∼11 μm) composite solid electrolyte (CSE) membrane by exploiting a spontaneous precipitation of Li 7 La 3 Zr 2 O 12 in a polymer-lithium salt matrix. The polymer-in-ceramic layer is toward a high-voltage cathode, which can effectively inhibit oxidative decomposition of electrolytes. The ceramic-in-polymer layer toward the anode can provide good flexibility. Experimental results show that the CSE bilayer membrane has not only high ionic conductivity but also satisfactory Li + transference number. It also exhibits excellent thermal and mechanical properties. High-voltage Li||LiCoO 2 (4.5 V) cell employing this CSE membrane exhibits excellent cycling stability (151.18 mAh g −1 at 1 C after 100 cycles), and superior rate performance (124.31 mAh g −1 10 C). This work guides the improvement of both solid state electrolyte membrane and high-voltage solid-state lithium metal batteries.
研究领域:
材料科学
·
电化学
·
能源存储
·
固态电池
·
纳米复合材料
·
界面工程
·
高能密度电池
✓ 已验证
DOI
高影响因子
Energy Technology
·
2021
·Vol. 10
·期 2
·2100350
·
IF 3.631
Liyue Xiao,Shuangrui Yao,Jie Liu,Hanjun Zou,Yanqin Xu,Yuan Cao,Changguo Chen
The nickel-based metallic organic framework (Ni-MOF) [Ni 2 (OH) 2 (C 8 H 4 O 4 )] material with a hierarchical microblocks structure is efficiently synthesized in 2 h by the ultrasonic method. At the moment Ni-MOF is used as the electrode materials and the supercapacitors (SCs) perform very well with great electrochemical capacity which exhibited particular electric capacitance of 631 C g −1 at a current density of 1 A g −1 . This is one of the highest performances and the shortest synthesis time reported so far for MOFs. Besides, there is a battery – SC hybrid SC assembled by using Ni-MOF and activated carbon. On the condition of having a power density of 302.2 W kg −1 with the voltage window of 1.2 V, the SC produces an energy density of 28.5 W h kg −1 . During the same period, the SC maintains outstanding cycling stability capacitance retention of 85.5% after 3000 cycles at current density of 10 A g −1 . The great electrochemical capability is due to the distinct crystal texture and particular morphological feature. Herein, it is displayed that the ultrasonic method is a fast and effective approach for preparing Ni-MOF SC electrode materials.
研究领域:
材料科学
·
电化学
·
纳米材料
·
能源存储
·
功能材料
✓ 已验证
DOI
高影响因子
DALTON TRANSACTIONS
·
2017
·Vol. 46
·期 13
·4403-4411
·
IF 4.029
Chenle Zhang,Libo Deng,Peixin Zhang,Xiangzhong Ren,Yongliang Li,Tingshu He
The performance of a dye-sensitized solar cell (DSSC) is strongly influenced by the catalytic performance of its counter electrode (CE) materials. Platinum (Pt) is conventionally used as the CE for DSSCs, but it is precious and is readily corroded by the iodide/triiodide electrolyte. Herein, mesoporous NiCo2O4 networks with different types of building blocks were prepared by electrospinning of a composite solution followed by annealing in air, and their performances as CEs in DSSCs were investigated. The honeycomb-like NiCo2O4 exhibited better performance than the nanotube ones, showing a photoelectric conversion efficiency of 7.09% which is higher than that of a standard Pt CE (7.05%) under the same conditions. The enhanced electrode performance was attributed to the relatively larger surface area and higher conductivity. The preparation methods demonstrated in this study are scalable and would pave the way for practical applications of Pt-free DSSCs.
研究领域:
材料科学
·
能源化学
·
纳米科技
·
电化学
·
可再生能源
✓ 已验证
DOI
高影响因子
危险品化学品经营许可证（带存储）