INORGANIC CHEMISTRY COMMUNICATIONS
·
2021
·
IF 2.495
Xia Zhang,Qiumin Cao,Zhuohuan Guo,Meiyue Zhang,Meng Zhou,Zhenzhen Zhai,Yuandong Xu
MoS 2 nanosheet arrays grown on functional pomelo peel derived carbon (PPC) is constructed via in situ self-assembly method. The obtained MoS 2 /PPC composite is further used to fabricate electrochemical sensor for taxifolin detection. The current response of taxifolin on MoS 2 /PPC is significantly enhanced due to the synergistic effect between MoS 2 and PPC. It is found that the charge transfer impedance and the Ohmic resistance corresponding to MoS 2 /PPC are the lowest, indicating fast electron transfer rate and good conductivity. Further investigation reveals that the redox peak current is linearly related to the concentration of taxifolin in the range of 7 × 10 −8 –1 × 10 −5 mol·L −1 and the limit of detection is calculated to be 2.3 × 10 −8 mol·L −1 (S/N = 3). In addition, no obvious interfering phenomenonhas been observed in the detection process of taxifolin, demonstrating that MoS 2 /PPC presents good selectivity toward taxifolin determination.
研究领域:
材料科学
·
电化学
·
分析化学
·
纳米技术
·
生物传感器
·
环境监测
✓ 已验证
DOI
高影响因子
ELECTROCHIMICA ACTA
·
2020
·
IF 6.215
Qing Xuan Shi,Chen Chang,Hui Jie Pei,Xin Guan,Liang Liang Yin,Xiao Lin Xie,Yun Sheng Ye
The lithium–sulfur (Li–S) battery holds great promising for the next-generation energy storage system due to its high theoretical specific capacity and energy density . However, the poor conductivity of sulfur species and the “shuttle effect” of polysulfides (PSs) severely limit the practical application of Li–S battery. Here, a large-scaled covalent triazine framework/multiwall carbon nanotube (CTF/MWCNT) hybrid used as a multi-functional separator modifier combining strong PSs-anchor ability of CTF with high electrical conductivity of MWCNT was proposed. The ordered porous structure and large specific surface area of CTF make it good physical trap ability for PSs shuttle, and the abundant pyridinic nitrogen groups of CTF render it effectively adsorb PSs by chemical sorption , while the high electrical conductivity of MWCNT can facilitate electron transfer . As it turns out that the multi-functional separator applied in Li–S battery shows significant enhancements in the utilization of sulfur, specific capacity, Columbic efficiency, rate capability (982 mAh g −1 at 2 C) and cycling stability (0.045% specific capacity loss per cycle at 1 C along 1000 cycles) as well as suppression of self-discharge and Li dendrite growth. Furthermore, it is practicable to incorporate the slurry cast multi-functional layer onto the commercial separator, which provides ideas for constructing advanced multi-functional separators for commercially viable Li–S battery.
研究领域:
材料科学
·
电化学
·
能源存储
·
纳米复合材料
·
电池技术
✓ 已验证
DOI
高影响因子
SOLID STATE IONICS
·
2019
·
IF 2.886
Fan Deng,Yongmin Wu,Weiping Tang,Shufeng Song,Zhaoyin Wen,Masashi Kotobuki,Li Lu,Jianyao Yao,Ning Hu,Janina Molenda
The use of garnet-type conductors as electrolytes for safe lithium solid-state batteries is impeded by the lack of critical processing strategy to stabilize and densify the cubic lithium garnets. The synthesis and processing of dense cubic lithium garnets are typically depending on solid state reaction as a result of unintentional Al contamination from the alumina crucibles at temperatures up to 1230 °C. High Al concentration is also believed to induce the sluggish migration of lithium ions . Here, we demonstrate an ultrathin, conformal γ-Al 2 O 3 surface coating on garnet solids by a hybrid microemulsion solid-state method for accomplishing rational and controllable synthesis and processing of dense cubic garnets with low Al concentration. The γ-Al 2 O 3 coating demonstrates fast-ion conducting Al-doped Li 6.75 La 3 Zr 1.75 Ta 0.25 O 12 phase with low Al concentration (~0.17 mol per formula unit), low tetragonal-to-cubic phase transformation temperature of 500 °C, and total conductivity of ~4.4 × 10 − 4 S cm − 1 . Specifically, the desired microstructures of the sintered pellets with uniform grains are revealed. As a proof-of-concept, we demonstrate that the nanoscale γ-Al 2 O 3 modification garnet conductor Li 6.75 La 3 Zr 1.75 Ta 0.25 O 12 is available to suppress lithium dendrites in symmetric Li/γ-Al 2 O 3 coating Li 6.75 La 3 Zr 1.75 Ta 0.25 O 12 /Li cells during lithium plating/stripping at room temperature, with current densities of 0.026 to 0.5 mA cm − 2 . The Li/γ-Al 2 O 3 coating Li 6.75 La 3 Zr 1.75 Ta 0.25 O 12 /LiNi 0.5 Co 0.2 Mn 0.3 O 2 cell delivered a high initial discharge capacity of ~164.2 mAh g − 1 , more importantly, an outstanding cycling performance with a capacity retention of 90.16% after 30 cycles at 0.1C and room temperature. This new synthesis route and the utilization of nanoscale γ-Al 2 O 3 surface modification could open up new avenue to lithium garnet conductors with reliable synthesis for all-solid-state lithium batteries application.
研究领域:
材料科学
·
电化学
·
固态离子学
·
能源存储
·
纳米材料
·
电池技术
✓ 已验证
DOI
高影响因子
CARBON
·
2022
·
IF 11.307
Xu Zhao,Jizhen Zhang,Ke Lv,Na Kong,Yanqiu Shao,Jinlong Tao
Mechanically strong and electrically conducting fibers, particularly those with high specific capacitances, are promising fiber-shaped electrodes for fiber- and textile-based energy storage devices like fiber-shaped supercapacitors (FSCs). However, a high loading of fillers or bridging agents is commonly required to fabricate fiber electrodes with good mechanical strength , which compromises electrical conductivity and energy storage performance. Herein, an easily scalable wet-spinning strategy is reported to fabricate multifunctional Ti 3 C 2 T x MXene/carbon nanotubes (MXene/CNT) hybrid fibers from a harmonious mixture of MXene and CNT in water and using acetic acid as a coagulation bath . The hybrid fiber achieved high strength (61 ± 7 MPa), good conductivity (1142.08 ± 40.04 S cm −1 ) and excellent energy storage performance (∼295 F g −1 at 5 mV s −1 ) at a very low CNT content of ∼1 wt%. When CNT loading increased to ∼9 wt%, the maximum strain at broken reached 161 ± 19 MPa and conductivity further increased to 1715 ± 22 S cm −1 . The excellent mechanical performance allows hybrid fibers to be knitted into textiles for energy storage textiles. The assembled FSCs exhibit energy and power densities of ∼6.08 mW h cm −3 and ∼6440 mW cm −3 , respectively. The excellent performance of MXene/CNT fiber and good feasibility for scalable production will open up new opportunities for the development of wearable and textile-based devices in the near future.
研究领域:
材料科学
·
纳米科技
·
能源存储
·
纺织电子学
·
高分子物理
✓ 已验证
DOI
高影响因子
JOURNAL OF ALLOYS AND COMPOUNDS
·
2009
·
IF 1.51
Rongguan Lv,Jun Yang,Pengfei Gao,Yanna NuLi,Jiulin Wang
A mixture of nanoporous and nanofibrous silicon (NPNF-Si) is prepared by the mechanochemical reduction of SiCl 4 using Li 13 Si 4 as reducing agent in the presence of Super P carbon (SP) and the following thermal treatment and washing process. Morphologies and structures of the as-obtained composites are investigated using scanning electron microscopy (SEM), transmission electron microscopy (TEM) and X-ray diffraction (XRD). After carbon coating via pyrolysis of polyvinyl chloride (PVC), the resulting NPNF-Si/SP/C composite is evaluated for the use as anode material in lithium-ion battery. It exhibits the first discharge capacity of 746.6 mAh g −1 at current density of 0.2 mA mg −1 and capacity retention of 91.1% after 30 cycles. The good electrochemical performance arises from the particular Si nano-structure, which can alleviate the volume effect during lithium insertion and extraction.
研究领域:
材料科学
·
电化学
·
纳米科技
·
能源存储
·
锂离子电池
✓ 已验证
DOI
高影响因子
JOURNAL OF NON-CRYSTALLINE SOLIDS
·
2019
·
IF 2.6
Ang Qiao,Haizheng Tao,Yuanzheng Yue
Amorphous conductors with high ionic conductivity are a promising candidate as electrolytes in all-solid state batteries. In this work, we prepared amorphous Ag 3 PS 4 conductor via a chemo-mechanical milling process, and then characterized its structure and electrochemical properties . The results show that Ag + conductivity of the amorphous Ag 3 PS 4 was remarkably enhanced by three orders of magnitude compared to its crystalline counterpart. Furthermore, the amorphous sample exhibits lower activation energy ( E a ) for ionic conductivity as a function of temperature. Structural characterizations indicate that the tetrahedral [PS 4 ] units were retained in amorphous Ag 3 PS 4 , but the Ag + ions became more liberated than those in the crystalline state, leading to the enhanced migration of Ag + ions, thereby, the ionic conductivity in amorphous Ag 3 PS 4 is drastically increased. This work provides insight into the crucial role of the disorder in raising the ionic conductivity of amorphized chalcogenide materials containing mobile ions.
研究领域:
材料科学
·
固体化学
·
能源材料
·
电化学
·
无机非金属材料
·
固态电池
·
离子传导
✓ 已验证
DOI
高影响因子
CHEMICAL ENGINEERING JOURNAL
·
2019
·
IF 8.355
Kuan Wu,Gang Xu,Dengyu Pan,Minghong Wu
Combination of high-capacity and flexibility in electrode materials is crucial for flexible electronics. Recently, red phosphorus (P) has caused increasing focus as a hopeful storage material for lithium storage due to its super-high theoretical capacity and low cost. However, the low conductivity of red P and its large volume change during cycling process lead to reduced electrochemical activity. So far, no effective methods have been developed to construct flexible binder-free electrodes using red P as an active material for high-performance lithium-ion batteries (LIBs). Here, a novel hollow three‐dimensional (3D) internet structure as a flexible high-areal-capacity electrode material was fabricated by confining red P nanoparticles into compact MOF-derived carbon-based composite polyhedrons/carbon nanotube internets. The electrode manifests an excellent lithium storage performance for LIBs with a high discharge capacity of 4.78 mAh cm −2 (1920 mAh g −1 ) at 0.1 mA cm −2 and a good capacity retention of 79.2% at 1 mA cm −2 after 300 cycles (73% and 69% capacity retention at 5 and 10 mA cm −2 after 500 cycles, respectively). The novel flexible anode materials can provide excellent Li + storage performance for flexible electronics applications.
研究领域:
材料科学
·
电化学
·
纳米材料
·
能源存储
·
功能材料
·
先进电池技术
✓ 已验证
DOI
高影响因子
Desalination and Water Treatment
·
2024
·
IF 1
Yan-zhen Shen,Xun-liang Wang,Yu-xiang Jia,Meng Wang
The endowment of perm-selectivity for specific ions will further extend the applications of heterogeneous membrane. In this work, a side-chain type weak cationic polyelectrolyte, PVDF-g-PVP, was synthesized for surface hydrophobilization of heterogeneous anion-exchange membrane (AEM) in order to impart perm-selectivity between specific anions with different Gibbs hydration energy. After microstructure observation and chemical composition analyses by SEM, AFM, EA and FTIR, the perm-selectivity between specific anions, electrical resistance, transport number, limiting current density, surface homogeneity, as well as salt permeability of the modified AEMs were investigated. Series of electrodialysis experiments in SO 4 2– /Cl – system indicated that a significant perm-selectivity was indeed achieved by the attachment of PVDF-g-PVP coating. In particular, it was worth noting that only a small loss of membrane conductivity was observed after the functionalization. This should be closely related to the micro-phase separation morphology of the coating layer which was induced by the polarity difference between the main chains and side chains of PVDF-g-PVP. Besides, the chronopotentiometric analyses indicated surface homogeneity of the heterogeneous AEM was significantly enhanced and then effectively ameliorated concentration polarization behaviors at the membrane-solution interface. Meanwhile, the perm-selectivity for co-ions was also improved and suppressed back diffusion behaviors of salt driven by concentration gradient. In brief, the modifying scheme proposed in this work can effectively improve comprehensive transport properties of conventional heterogeneous AEM.
研究领域:
膜科学与技术
·
高分子材料化学
·
分离科学
·
电化学工程
·
功能材料
✓ 已验证
DOI
高影响因子
CERAMICS INTERNATIONAL
·
2017
·Vol. 43
·期 12
·9327-9333
·
IF 2.986
Nan Zhou,Shengxiong Huang,Tao Hong,Wei Luo,Yun Tian,Xiangyang Lu,Zhi Zhou
In this paper, LiTi 2 (PO 4 ) 3 @carbon composite as anode for aqueous lithium ion battery has been successfully synthesized by in-situ carbon coating method using oxalic acid and glucose as double carbon sources. XRD results confirm the rhombohedral NASICON-type LiTi 2 (PO 4 ) 3 structure of the as-prepared composite. The LiTi 2 (PO 4 ) 3 @carbon composite using double carbon sources (LTP-OG-10) disperses well, and the coated carbon layer has the appropriate thickness of 3–7 nm, which result in proper balance of the good electrical conductivity and the fast kinetics of diffusion of lithium ions . LTP-OG-10 exhibits better electrochemical performance compared with those using oxalic acid (LTP-O) or glucose (LTP-G) single carbon source. LTP-OG-10 anode delivers the discharge capacity of 112.5 mA h g −1 , 96.8 mA h g −1 , and 54.2 mA h g −1 at 0.2 C, 5 C and 20 C, respectively, much larger than that of LTP-O and LTP-G. Moreover, LTP-OG-10 demonstrated excellent cycling performance, with the capacity retention of 71.1% after 400 cycles at 0.2 C, 22.9% higher than that of LTP-G. The good electrochemical properties of LTP-OG-10 is mainly ascribed to the increase of defects, high-quality and appropriate thickness of carbon layer. Our study reveals that preparing LiTi 2 (PO 4 ) 3 @carbon composite using double carbon sources is an efficient approach to enhance its electrochemical properties.
研究领域:
材料科学
·
电化学
·
能源存储
·
无机非金属材料
·
功能材料
✓ 已验证
DOI
高影响因子
JOURNAL OF HAZARDOUS MATERIALS
·
2023
·
IF 13.6
Kang Liu,Mengmeng Wang,Qiaozhi Zhang,Shanta Dutta,Tianle Zheng,Marjorie Valix,Daniel C.W. Tsang
Copper plays a crucial role in the low-carbon transformation of global communities with prevalent use of electric vehicles. This study proposed an environmentally friendly approach that utilizes a deep eutectic solvent (DES), choline chloride-ethylene glycol (ChCl-EG), as green solvent for the selective extraction of copper from scrap materials . With hydrogen peroxide as an oxidizing agent , the copper species from the printed circuit boards (PCBs) scraps were efficiently leached by the DES through oxidation-complexation reactions (conditions: 25 min, 20 °C, and 5 wt% H 2 O 2 ). Molecular dynamics and density functional theory were performed to simulate the intricate cascade of interactions between copper species and hydrogen bond donors/acceptors of DES, providing insights into the mechanistic processes involved. Copper was selectively recovered from the DES leachate containing impurities (e.g. , Pb 2+ , Sn 2+ , and Al 3+ ) through electrodeposition via a diffusion-controlled reaction under a constant potential mode. A comprehensive life cycle assessment of the process demonstrated that the utilisation of DES in the extraction of copper from waste PCBs could result in significant reduction in carbon dioxide emissions (−93.6 kg CO 2 eq of 1000 kg waste PCBs), thus mitigating the carbon footprint of global copper use through the proposed solvometallurgical recycling process of secondary resources.
研究领域:
环境科学
·
冶金工程
·
绿色化学
·
资源循环利用
·
可持续材料
✓ 已验证
DOI
高影响因子
JOURNAL OF APPLIED POLYMER SCIENCE
·
2022
·Vol. 139
·期 23
·52314
·
IF 3.057
Xiangrong Chen,Zelin Hong,Chao Dai,Muhammad Awais,Fan-Bo Meng,Ashish Paramane,Hao Li
This paper investigates the influence of voltage stabilizer and nanofiller addition on the insulation performance of the cross-linked polyethylene (XLPE). The test samples of XLPE/stabilizer blends consisting of 1 wt% m-aminobenzoic acid, XLPE nanocomposites consisting of 0.5 wt% nano MgO and XLPE hybrid composite consisting of both voltage stabilizer and nanofillers were prepared. Various physicochemical and electrical properties were measured to analyze the performance of prepared samples. The obtained results show that the addition of nanofillers deteriorates the electrical insulation performance of the XLPE. On the other hand, the voltage stabilizer addition proves to be suitable for enhancing the electrical insulation performance of the XLPE. Meanwhile, the hybrid XLPE composites have shown medium behavior. The voltage stabilizer addition reduces, but the nanofillers increase the space charge density inside the XLPE compared to pure XLPE. It is also found that the dispersion of the voltage stabilizer in the material is uniform, whereas the nanofillers are aggregated. Furthermore, both additives slightly improve the thermal stability of the XLPE. The trap level theory based on quantum chemical calculation is proposed to explain the influence mechanism of the additives on the XLPE.
研究领域:
高分子材料科学
·
电气工程
·
绝缘材料
·
介电物理
·
材料化学
·
聚合物纳米复合材料
✓ 已验证
DOI
高影响因子
Solar RRL
·
2023
·Vol. 8
·期 4
·2300926
·
IF 7.9
Qiuju Liu,Yang Liu,Hu Liu,Qingyong Tian,Bin Fan,Hua Bai
Room-temperature-processed (RTP) electron-transport layer (ETL) is a prerequisite for fabricating fully RTP perovskite solar cells (PSCs). Herein, an RTP-Zn 2 SnO 4 (ZSO) ETL is deposited for achieving RTP-PSCs by magnetron sputtering using ZnO and SnO 2 targets. The ZSO ETL exhibits great electrical properties, better band alignment, and yields increased grain size of the perovskite grown on it, thus facilitating electron extraction from the perovskite layer to the ETL. As a result, a champion power conversion efficiency of 21.06% is achieved in the ZSO-based device, which is the highest value for RTP-PSCs. The ZSO-based PSCs also exhibit high device stability. Moreover, the efficiency of a large-area perovskite module based on ZSO ETL reaches 17.79%.
研究领域:
材料科学
·
光伏技术
·
纳米材料
·
半导体物理
·
能源材料
✓ 已验证
DOI
高影响因子
危险品化学品经营许可证（带存储）