Journal of Solid State Electrochemistry

Liu, Jie; Zou, Zhengguang; Zhang, Shuchao; Zhang, Huanhuan

doi: 10.1007/s10008-020-04818-5pmid: N/A

LiNi0.8Co0.1Mn0.1O2 (NCM811), as one of the most promising cathode materials for lithium ion batteries, has gained a huge market with its obvious advantages of high energy density and low cost. It has become a competitive material among various cathode materials. However, in NCM811, the phenomenon of “cationic mixed discharge” is serious, resulting the cyclic performance performing badly. In addition, the thermal stability of ternary material will also be poor with the increase of nickel when temperature is high. In view of the above-mentioned situation, researchers come up with different methods to modify LiNi0.8Co0.1Mn0.1O2 by doping and coating to reduce mixing effect and improve its electrochemical performance. Here, we sketch out the structure, properties, and existing problems of NCM811 and summarize some cutting-edge modification methods. Finally, the development direction and commercial application of NCM811 cathode materials are prospected to accelerate its commercialization process.

Mairanovsky, Victor G.

doi: 10.1007/s10008-020-04652-9pmid: N/A

Based on the results of previous experiments, including some unpublished data, a general approach to the investigation of the electrode–solution interfacial region is proposed, consisting in a combined study of (i) the molecular reactivity and (ii) the properties of the medium. The first is carried out by a comparative structural analysis of products of direct electrolysis vs. homogeneous electrocatalysis with the gradual displacement of the reaction zone from the electrode surface into the bulk (the method called “near-electrode tomography,” NELTO); a number of related issues are considered. The second, in addition to the classical methods of studying the electrical double layer, involves measurements of the viscosity, of the dielectric constant, etc., using, in particular, modified atomic force microscopy techniques. By comparing the data of the NELTO on changes in molecular reactivity (“molecular effects”) with the changes in the properties of the near-electrode medium (“collective effects”), new possibilities arise for establishing the nature of phenomena in the electrode–solution interfacial area.

Mairanovsky, Victor G.

doi: 10.1007/s10008-020-04881-ypmid: N/A

A Correction to this paper has been published: https://doi.org/10.1007/s10008-020-04881-y

Cao, Xiaohong; Sun, Yanbing; Wang, Yingcai; Zhang, Zhibin; Dai, Ying; Liu, Yuhui; Wang, Youqun; Liu, Yunhai

doi: 10.1007/s10008-020-04668-1pmid: N/A

PtRu bimetallic nanoparticles embedded in MOF-derived porous carbons (PtRu-PCs) were synthesized by first loading PtRu bimetallic nanoparticles into a UiO66-NH2 host matrix and then going in situ carbonization at high temperatures. In the synthetic strategy, UiO66-NH2 was used not only as a precursor to limit the aggregation and migration of PtRu bimetallic nanoparticles, but also as a self-sacrificial template to improve the conductivity. The as-prepared PtRu-PCs were characterized by SEM, TEM, XRD, and XPS. The PtRu-PC-based sensor had excellent sensitivity with a detection limit of 0.024 μM (S/N = 3). The developed method was successfully applied to real water samples with a recovery rate of 92–107%.

Al-Jawad, Selma M. H.; Ismail, Mukhlis M.; Ghazi, Sara F.

doi: 10.1007/s10008-020-04823-8pmid: N/A

In this work, un-doped and Mn-doped TiO2 nanorod (NR) array films were successfully prepared by hydrothermal method that deposited on FTO substrate at different molar ratios (x = 0, 0.025, 0.05, 0.075, and 0.1). The prepared samples were examined by X-ray diffraction (XRD) and field emission scanning electron microscopy (FESEM). XRD illustrates the pure rutile phase in all samples. The preferred orientation along [001] for pure sample convert to [101] direction with increasing doping content. Lattice constants increase with increasing doping content. The top view of FESEM images show the uniformly distributed nanorod arrays. The nanorods’ length decrease, and their diameters increase with increasing doping content. The nanorods start to bevel from its vertical direction after doping. The crystal size of TiO2 NRs with different manganese doping has calculated using the Williamson-Hall plot. The saturation magnetism appeared in pure titanium oxide has been attributed to the oxygen vacancies, while it changed to diluted magnetic semiconductor after doped with Mn.

Kamyabi, Mohammad Ali; Alipour, Zahra; Moharramnezhad, Mohsen

doi: 10.1007/s10008-020-04820-xpmid: N/A

Here is reported a new feasible and facile method for the determination of amoxicillin by the electrochemiluminescence (ECL) method. The ECL signal was produced by the sensitive reaction between amoxicillin and luminol on the modified ZnO nanoparticle/nickel foam (ZnONP/Ni-foam) electrode. The silica film was used as a size controller template to modify the nickel foam with zinc oxide nanoparticles (ZnONPs). Electrochemiluminescence emission of luminol in the negative potential window was enhanced in the presence of the deposited nanoparticles. The characterization of the ZnONP/Ni-foam electrode was carried out with electrochemical impedance spectroscopy, X-ray diffraction analysis, field emission scanning electron microscopy, and energy-dispersive X-ray analysis. The fabricated electrode was applied for trace analysis of amoxicillin by an ultrasensitive ECL technique in the alkaline solutions. The modified electrode indicated high sensitivity toward amoxicillin under the optimal conditions in the wide linear range of 4.0 × 10−11–6.5 × 10−5 M with a low detection limit of 8.3 × 10−12 M and relative standard deviation of 1.42%. The proposed ECL-based sensor presented superior proficiency for accurate analysis of amoxicillin with high selectivity and excellent repeatability and it was successfully applied for the determination of amoxicillin in some food samples with admissible outcomes.

Zhou, Weibin; Liu, Yu; Dai, Haodong; Yuan, Xinhai; Peng, Yuxiang; Huang, Wen; Fu, Lijun; Zhu, Yusong; Wu, Yuping; Wang, Xudong

doi: 10.1007/s10008-020-04812-xpmid: N/A

The strong demand on high-performance lithium ion batteries has brought up an attention upsurge in the research society and the commercial market. Carbon materials have shown the great potential as anode materials for lithium ion batteries since they are low-cost, safe, abundant, and electrochemically stable. In this work, we report a selenium-doped carbon anode through carbonizing the mixture of selenium and an organic compound of naphthalenetetracarboxylic dianhydride. Benefiting from the porous structure, enlarged BET specific area, and active defects from the doping of Se, the material shows excellent rate capability. It delivers a high specific capacity of 450 mAh g−1 after 580 cycles at the current density of 500 mA g−1 and a specific capacity of 170 mAh g−1 after 2400 cycles at the current density of 1000 mA g−1. The superb performance of this material proves its potential as anode for high-performance lithium ion batteries.Graphical abstractExcellent electrochemical performance including high reversible capacity, and good cycling at high or low current density is obtained via Se doping.[graphic not available: see fulltext]

Nandhini, S.; Muralidharan, G.

doi: 10.1007/s10008-020-04824-7pmid: N/A

The task of developing hybrid nanostructured materials to enhance the energy and power density of energy storage devices has assumed greater significance in the past decade. The present research work demonstrates the hydrothermal preparation of graphene-blended Co3S4-CoS nanostructures (CSG) and the fabrication of a symmetric supercapacitor device. The CSG was examined through structural, morphological, surface area and electrochemical characterization. The CSG nanostructures yielded a maximum specific capacitance of 1003 F g−1 at 5 A g−1 with excellent rate capacitance (43%) at 50 A g−1. The CSG nanostructure shows 97% cycling stability over 2600 cycles. The well-blended structure, high conductivity and large surface area of CSG contribute to the best capacitive performance. A CSG-based symmetric supercapacitor device offered a great energy density of 26.7 W h kg−1 at 1 A g−1. The device exhibits good cyclic stability even after 5000 cycles. Three devices connected in series (4.5 V) were charged for 141 s at a current of 10 A could power up red and green LEDs for over 600 s and 480 s, respectively. The obtained electrochemical results and exceptional performance of symmetric devices endorse CSG to be a promising material for energy storage applications.

Khadiri, M.; Elyaagoubi, M.; Idouhli, R.; Mabrouki, M.; Abouelfida, A.; Outzourhit, A.

doi: 10.1007/s10008-020-04807-8pmid: N/A

Bi2Se3 compound was deposited catholically under potential control, from a mixture solution composed from equimolar SeO2 and BiCl3. The concentration of selenium and bismuth precursors was about 5 ∙ 10−3 M. The electrodeposited films were grown on FTO substrates (Transparent Conductive Glass Fluorine-Doped Tin Oxide (FTO)–Coated Glass). Deposition potential was determined from cyclic voltammetry (CV) where the platinum mesh was taken as working electrode. The growth kinetics depends on the applied potential. It was found, using EDS technique, that suitable ratio of Se/Bi corresponding to Bi2Se3 was reached at − 250 mV vs. SCE (saturated calomel electrode). X-ray and grazing X-ray diffraction revealed that the obtained film at − 250 and − 200 mV/SCE consisted a rhombohedral Bi2Se3 structure. Raman shift was employed to corroborate the X-ray results with the possibility of formation of a rhombohedral Bi2Se3 when the applied potential was − 200 mV (vs. SCE). The Bi2Se3-obtained films were an n-type semiconductor with a carrier charge concentration which depends on the applied potential.

Zehra, Aiman; Khan, Mohammad Mujahid Ali; Rafiuddin,

doi: 10.1007/s10008-020-04821-wpmid: N/A

Herein, we elaborated on the feasibility of coupling polyvinyl chloride with tin aluminium molybdophosphate to form composite membranes that facilitate enhanced electro-transport properties. Additionally, the effect of appropriate material selection on attaining excellent stability and selectivity of a membrane was investigated, and the membrane with 25% polymer had the best results in terms of improved ion exchange capacity, water uptake, porosity, membrane potential, and chemical and thermal stabilities. The electrochemical properties of the membrane that had the most stable polymer ratio were evaluated according to the membrane potential and fixed charge density measurements using different 1:1 ratios of electrolytes with various concentrations (1 M to 0.01 M). The membrane potential, transport number, and mobility ratio of the electrolytes from the highest to lowest were NaCl > KCl > NaNO3 > KNO3.The measured membrane potentials closely agreed with the theoretical predictions from a mathematical model called the Toerell, Maeyer, and Siever (TMS) model, confirming efficiency and selectivity.