Sustainable Energy & Fuels
·
2021
·Vol. 5
·期 5
·1538-1547
·
IF 6.367
Ruyan Lei,Yanping Yang,Chenjuan Yu,Yinsi Xu,Yuanzhuo Li,Jun Li
In order to improve the electrochemical performance and efficiently prepare a solid polymer electrolyte (SPE) for the lithium-metal battery (LMB), a fumed SiO2 (FS) with surface Si–OH group was used to fabricate FS-modified poly(ethylene oxide) (PEO)–LiClO4-based SPE by a facile preparation process. The influences of the FS content on the morphological properties, thermal properties, lithium salt dissociation, mechanical properties, and electrochemical properties of SPE were systematically analyzed. Results indicate that FS with the hydrophilic property was widely distributed throughout the amorphous phase of SPE, thus the crystallinity of SPE was reduced to 25.83% when the FS mass loading was 6.85 wt%. In addition, a greater dissociation degree of lithium salt was achieved after the addition of FS, and a higher ion conductivity of 3.03 × 10−4 S cm−1 and Li-ion migration number of 0.396 were recorded at 60 °C. The all-solid-state Li/SPE/Li coin cell showed excellent stable cyclability (380 h) and the LiFePO4 (LFP)/SPE/Li coin cell demonstrated good discharge specific capacity and coulomb efficiency of 96 mA h g−1 and 100.2%, respectively, after 100 cycles of galvanostatic charge–discharge operation under 0.5C at 60 °C. Thus, based on collective results, it is expected that SPE presented in this work is a promising electrolyte for next-generation high-energy all-solid-state LMB with enhanced safety.
研究领域:
材料科学
·
电化学
·
能源存储
·
高分子化学
·
固态离子学
✓ 已验证
DOI
高影响因子
JOURNAL OF ALLOYS AND COMPOUNDS
·
2020
·
IF 4.65
Xue Li,Guo-Long Tan
Coexistence of ferroelectricity and ferromagnetism in one single phase of a solid is of great interest because of the potential application for novel electronic devices. We report on the enhanced ferroelectricity jointly co-existing with excellent magnetic performance in M-type barium hexaferrite (BaFe 12 O 19 ), which demonstrating a classic electric polarization (P-E) hysteresis loop with full saturation. Two nonlinear current peaks in the I–V curve for polarization switch and giant abnormal change of dielectric constant near Curie temperatures provide sufficient experimental evidences to verify the ferroelectricity of BaFe 12 O 19 ceramics. It holds a large remnant polarization of 55.7 μC/cm 2 and a suitable coercive field at 441 kV/cm. Two peaks at 194 °C and 451 °C in the temperature-dependent dielectric spectrum of BaFe 12 O 19 ceramics are considered to be the phase transition from ferro-to antiferro- and antiferro-to para-electric structures. A conventional strong magnetic hysteresis loop was also observed. The influence of oxygen vacancies on the band structure, electric and magnetic properties has been discussed in detail. The magnetically induced E-polarization upon the BaFe 12 O 19 ceramics was achieved in the form of alternating spin current waves. These combined multiple functional responses of large ferroelectrics and strong ferromagnetism reveal the excellent multiferroic features of BaFe 12 O 19 , which would bring forth the great opportunity to create novel electric devices with active coupling effect between magnetic and electric orders.
研究领域:
凝聚态物理
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功能材料
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磁学
·
铁电学
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电子陶瓷
·
多场耦合材料
✓ 已验证
DOI
高影响因子
MATERIALS CHEMISTRY AND PHYSICS
·
2023
·
IF 4.6
Ziyu Chen,Anni Zhang,Chao Geng,Jianzhen Xiong,Pengchang Sun,Ni Tu,Yaxin Chen,Jiangmin Jiang,Zhicheng Ju
Carbon-based materials exhibit the advantages of low-operating voltages and non-toxicity and are thus considered promising anode components for potassium-ion batteries (PIBs) and lithium-ion batteries (LIBs). Herein, hydrothermal treatment and KOH activation combined with high-temperature carbonization were employed to fabricate hierarchical porous carbon , in which the low-cost coal as the carbon source. The proposed material shows rich microporous structures that facilitate Li + /K + adsorption/desorption and promote capacitive contributions, thus improving the dynamics of the electrochemical reaction . CBC-700 (carbonized at 700 °C), as an LIB anode material , delivers a specific capacity of up to 844 mAh g −1 , maintains 597 mAh g −1 under 1000 mA g −1 current density, and exhibits excellent capacity reversibility. When applied as a PIB anode material, the reversible specific capacity is preferable, with a value of 314 mAh g −1 , and the specific capacity at 500 mA g −1 is 235 mAh g −1 , apart from exhibiting excellent capacity reversibility. Significantly, it is highly expected that the coal-based carbon shows potential as an anode for the large-scale production of highly efficient LIBs and PIBs.
研究领域:
材料科学
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电化学
·
能源存储
·
纳米材料
·
碳材料
✓ 已验证
DOI
高影响因子
ELECTROCHIMICA ACTA
·
2019
·
IF 5.383
Liying Liu,Xuehang Wang,Vladimir Izotov,Dmytro Havrykov,Illia Koltsov,Wei Han,Yulia Zozulya,Olga Linyucheva,Veronika Zahorodna,Oleksiy Gogotsi,Yury Gogotsi
Increasing the mass loading of active material in a supercapacitor electrode improves the energy storage capability per electrode area. However, the increase of mass loading is accompanied by the increased electrode thickness, which often causes drops in specific capacitance and counteracts the potential increase in areal capacitance once the electrode thickness exceeds 100 μm. In our previous work, we showed high specific capacitance retention of coarse-grained carbide derived carbon (CDC) with electrode thicknesses up to 1000 μm in organic electrolytes. In this work, we report that this behavior can be extended to coarse-grained activated carbon (AC). AC is the most common commercial supercapacitor electrode material with a much broader pore size distribution and lower electric conductivity compared to CDC. The areal capacitance of the AC electrode is enhanced from 2.3 F/cm 2 to 7.4 F/cm 2 at 5 mV/s, as the electrode thickness increases from 200 to 800 μm. With the increased mass loading of the active electrode material, the mass and volume occupied by current collectors and separators are reduced in the electrode stack, which leads to an increase of the gravimetric and volumetric energy density of the device. By reporting on this advantageous behavior in thick electrodes using coarse-grained carbons, we hope to garner interest toward an unexplored method for improving the performance of porous carbon-based supercapacitors , without increasing the cost or changing the current used supercapacitor manufacturing process.
研究领域:
电化学
·
能源材料
·
纳米材料科学
·
储能技术
·
功能材料
✓ 已验证
DOI
高影响因子
Journal of Energy Chemistry
·
2023
·
IF 13.1
Fanghong Zeng,Lidan Xing,Wenguang Zhang,Zhangyating Xie,Mingzhu Liu,Xiaoyan Lin,Guangxia Tang,Changyong Mo,Weishan Li
Compared with graphite, the lower sodiation potential and larger discharge capacity of hard carbon (HC) makes it the most promising anode material for sodium-ion battery. Utilizing ether-based electrolyte rather than conventional carbonate-based electrolyte, HC achieves superior electrochemical performance. Nevertheless, the mechanism by which ether-based electrolyte improves the properties of HC is still controversial, primarily focusing on whether it forms solid electrolyte interphase (SEI) film. In this work, according to the sodium storage mechanisms in HC at low voltage (<0.1 V), including Na + -diglyme co-interaction into the carbon layer (SEI forbidden) and desolvated Na + insertion in the irregular carbon holes (SEI required), the NaPF 6 concentration in ether-based electrolyte was regulated, so as to construct a discontinuous-SEI on the surface of the HC anode, which significantly enhances the electrochemical performances of HC. Specifically, with 0.2 M NaPF 6 ether-based electrolyte, HC deliverers a discharge capacity of 459.7 mA h g −1 at 0.1 C and stays at 357.2 mA h g −1 after 500 cycles at 1 C, which is substantially higher than that of higher/lower salt concentration electrolytes.
研究领域:
电化学
·
材料科学
·
能源存储
·
电池技术
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纳米材料
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界面化学
·
应用物理
✓ 已验证
DOI
高影响因子
RSC Advances
·
2016
·Vol. 6
·期 105
·103508-103516
·
IF 3.289
Guofu Ma,Fengting Hua,Kanjun Sun,Zhiguo Zhang,Enke Feng,Hui Peng,Ziqiang Lei
Sorghum stalk based porous carbons (SSCs) have been synthesized through a simple carbonization method at 800 °C used sorghum stalk as carbon precursor and ZnCl2 as activating agent. The morphology and structure of the SSCs are investigated by scanning electron microscopy, transmission electron microscopy, nitrogen adsorption–desorption, Raman spectra and X-ray diffraction. Undergoes activation at optimal amount of zinc chloride (sorghum stalks to ZnCl2 is 1 : 1), the resulting samples, labeled as SSC1.0 has a porous texture with high specific surface area and efficient ion diffusion channels (1354.7 m2 g−1 specific surface areas and 0.765 cm3 g−1 pore volumes), and the sample also has superhydrophilicity characterized by water contact angles. As supercapacitor electrode, it can deliver 216.5 F g−1 specific capacitance at 0.5 A g−1, 75% capacitance retention even at 8 A g−1 in 2 mol L−1 KOH aqueous electrolyte and excellent cyclic stability with 92% capacitance retention after 5000 cycles at 5 A g−1. Moreover, the assembled SSC1.0//SSC1.0 symmetric cell has wide voltage range of 1.8 V, and high energy density in 0.5 mol L−1 Na2SO4 aqueous electrolyte.
研究领域:
材料科学
·
电化学
·
能源存储
·
纳米材料
·
环境功能材料
✓ 已验证
DOI
高影响因子
SOLID STATE IONICS
·
2021
·
IF 3.785
Songzhao Wang,Jiwen Hu,Xuefeng Gui,Shudong Lin,Yuanyuan Tu
Ni 12 P 5 has excellent electrochemical properties due to the existence of a large number of Ni P bonds with abundant phosphorus vacancies. RuO 2 has good electrical conductivity and catalytic activity , and its OER activity is very significant. In this paper, RuO 2 nanoparticles were loaded onto the surfaces of Ni 12 P 5 particles, forming RuO 2 /Ni 12 P 5 /C composite electrode catalytic materials which were prepared and applied to Li O 2 cells. The electrochemical tests reveal that the specific capacity of the Li O 2 battery with a RuO 2 /Ni 12 P 5 /C electrode reaches 4296 mAh g −1 , the cycle life reaches 56 cycles, and the over-potential is effectively controlled at the current density of 200 mA g −1 . This improvement is attributable to the effective adsorption of phosphorus vacancies in Ni 12 P 5 and the excellent OER catalytic activity of RuO 2 . Therefore, this work significantly enhanced the electrochemical performance of the cell, thus laying the foundation for the development of Li O 2 batteries.
研究领域:
电化学
·
材料科学
·
能源存储
·
催化化学
·
纳米材料
✓ 已验证
DOI
高影响因子
JOURNAL OF THE ELECTROCHEMICAL SOCIETY
·
2023
·Vol. 170
·期 12
·122505
·
IF 3.9
Yongxin Wu,Muya Cai,Hongya Wang,Zuojun Hu,Fangzhao Pang,Xiang Chen,Meiyu Zhao,Bingbing Wang,Xiong Zhang,Xiaowei Liu,Dihua Wang,Huayi Yin
Lead-acid batteries (LABs) are commonly utilized in various applications such as electric motorcycles, uninterruptible power systems, and stationary energy storage devices. Calcium (Ca) is an essential element being added to Pb grid alloys to increase their mechanical strength. In this paper, molten salt electrolysis is used to prepare Pb-Ca master alloy in molten CaCl2-NaCl at 700 °C. The Ca concentration reaches 2.51 wt%, and the current efficiency reaches 85.0% for the 1 A-scale electrolyzer and 75.8% for the 50 A-scale cell. Compared with the traditional physical mixing ways, Ca is selectively and gradually deposited in the liquid Pb cathode without worrying about the immense heat generated by mixing Ca and Pb. In addition, molten salt serves as a media to avoid the oxidation of Ca. Through thermodynamic calculations and electrochemical measurements, the Pb-Ca formation prefers to happen rather than Pb-Na alloy in molten CaCl2-NaCl because of the stronger interaction of Ca and Pb than Na and Pb. Overall, this paper provides a straightforward strategy to prepare Pb-Ca master alloys, which can be expanded to prepare various liquid semimetal alloys containing reactive metals.
研究领域:
材料科学
·
冶金工程
·
电化学
·
能源材料
·
功能合金
✓ 已验证
DOI
高影响因子
COMPOSITES SCIENCE AND TECHNOLOGY
·
2021
·
IF 8.528
Fangyan Zhu,Samson Ho-Sum Cheng,Yi Xu,Wenchao Liao,Kangqiang He,Dazhu Chen,Chengzhu Liao,Xin Cheng,Jiaoning Tang,Robert K.Y. Li,Chen Liu
The polymer composite electrolytes, especially garnet ceramic Li 6.4 La 3 Zr 1.4 Ta 0.6 O 12 reinforced polyethylene oxide (PEO), are expected to be the most promising substitute for commercial liquid electrolytes in lithium metal batteries due to their good safety, easy-manufacturing and flexibility. However, their insufficient ionic conductivity and instability towards reductive Li anode at room temperature are the long-standing issues. In this work, a dual-salt solid composite electrolyte with superior ambient-temperature electrochemical performance is designed by regulating polyethylene oxide/lithium perchlorate/Li 6.4 La 3 Zr 1.4 Ta 0.6 O 12 composite electrolyte with additive lithium tetrafluoroborate (LL@PL). The stable solid electrolyte interphase with LiF, B–F, and Li–B–O formed on lithium metal effectively induces even Li deposition and strengthens the compatibility of electrolyte/Li anode interface. The combined action of each composition in the electrolyte guarantees the efficient ion immigration kinetic and suppresses the lithium dendrite growth of solid-state batteries. The Li symmetric cells using [email protected] can steadily cycle for 1700 h without short circuit. An 80% capacity retention is achieved for LiFePO 4 | [email protected] |Li cell after 350 cycles at 25 °C. The electrochemical stability of the composite electrolyte is extended to 4.6 V and the assembled cell works well with LiNi 0.8 Co 0.1 Mn 0.1 O 2 cathode. This study proposed a promising polymer composite electrolyte for solid-state lithium metal batteries with superior performance.
研究领域:
材料科学
·
电化学
·
储能技术
·
固态电池
·
聚合物纳米复合材料
✓ 已验证
DOI
高影响因子
JOURNAL OF COLLOID AND INTERFACE SCIENCE
·
2018
·
IF 5.091
Nan Lu,Xi Zhang,Ruiqi Na,Wendi Ma,Chongyang Zhang,Yuchao Luo,Yongfeng Mu,Shuling Zhang,Guibin Wang
The synthesis of a nanocomposite gel polymer electrolytes (NGPEs) using Li + -functionalized SPEEK (SPEEK(Li)) nanofiber membrane as a matrix, cross-linked PVA as a gelled agent and LiClO 4 as an electrolytic salt for electric double layer capacitors (EDLCs) were reported in this work. Compared with conventional PVA based gel electrolyte, the “SO 3 − Li + ” functional groups and the pores structure of the SPEEK(Li) nanofiber membrane improves the ionic conductivity as well as mechanical stability , which made the prepared NGPEs exhibited a high ionic conductivity of 8.9 × 10 −3 S cm −1 at ambient temperature and a large voltage stability window range from 0 to 2.0 V. The fabricated symmetric EDLCs showed a specific capacitance of 146.96 F g −1 at a current density of 0.5 A g −1 , with a maximum energy density of 18.26 W h kg −1 . Meanwhile, the EDLCs showed outstanding cyclical stability of 98% specific capacitance retention after 3000 cycles GCD testing, all of these results indicated that the NGPEs should be appropriate to EDLCs and next-generation energy storage systems .
研究领域:
材料科学
·
电化学
·
能源存储
·
高分子化学
·
纳米技术
·
固体电解质
✓ 已验证
DOI
高影响因子
Batteries & Supercaps
·
2024
·Vol. 8
·期 2
·e202400404
·
IF 5.1
Jieshuangyang Chen,Rongyu Deng,Jinwei Zhou,Ziang Jiang,Mingzhi Qian,Feixiang Wu
The presence of free water molecules in the aqueous electrolyte leads to serious side reactions at the interface, easy dissolution of the cathode material, and uncontrolled growth of zinc dendrites in Zn-ion batteries, which hinders their practical applications. Here, we propose a type of SiO 2 -based soggy-sand electrolyte (ZnSO 4 +MnSO 4 electrolyte with SiO 2 , SiO 2 -ZMSO 4 ) and focus on the effect of the SiO 2 nanoparticle size on the performance of soggy-sand electrolyte. It is found that SiO 2 with smaller nanoparticle size provides higher porosity, and the SiO 2 network-formed can effectively trap the free water in the electrolyte, which increases the ionic conductivity of electrolyte, widens working voltage window, and decreases the internal resistance of batteries. As a result, the Zn//MnO 2 batteries with 20 nm SiO 2 -based soggy-sand electrolyte show stable cycling performance and rate capacities. The specific capacity of the battery can be maintained at 198.5 mAh g −1 after 1200 cycles at 1 A g −1 without capacity degradation. The specific capacity can be increased by 100 mAh g −1 even at a high rate of 5 A g −1 . This study provides the rule of particle selection for the development of aqueous soggy-sand electrolytes used in aqueous rechargeable batteries. Graphical In this study, a novel and practical electrolyte is proposed by adding different particle sizes of SiO 2 to the conventional electrolyte and reveals the effectiveness in zinc-ion batteries. The SiO 2 with smaller particle size has larger surface porosity and a denser network structure can be formed in the electrolyte, effectively reducing the number of free water and achieving high-performance aqueous zinc-ion batteries with a specific capacity of 183 mAh g −1 after 500 cycles at 1 A g −1 .
研究领域:
电化学
·
能源材料
·
纳米材料
·
电池技术
·
界面化学
✓ 已验证
DOI
高影响因子
JOURNAL OF ALLOYS AND COMPOUNDS
·
2022
·
IF 6.371
Jiafeng Wu,Yang Chen,Jianmin Chen,Yajing Wang,Ting Fan,Yingwei Li
Inferior specific capacity and sluggish redox kinetics are the most stubborn problems lithium-ion and lithium-sulfur batteries (LIBs and LSBs) are facing, respectively. Here we report a facile fabrication of self-supported hollow Co 3 O 4 @carbon nanotubes on carbon cloth (H-Co 3 O 4 @CNT/CC) through a mild pyrolysis-oxidation process. The additive- and binder-free H-Co 3 O 4 @CNT/CC shows excellent electrochemical performances as both LIBs and LSBs electrodes. As a robust integrated anode for LIBs , the areal capacities are 2.72 mAh cm −2 at the current density of 0.5 C over 1000 cycles. While as a durable cathode host for LSBs, favorable areal capacities of 2.37 mAh cm −2 are maintained with a low capacity decay of 0.11 % per cycle at the sulfur loading of 6 mg cm −2 and current density of 1 C after 400 cycles. Electrochemical technology, ex situ Raman spectroscopy and DFT calculations are performed to comprehensively analyze H-Co 3 O 4 @CNT/CC via thermodynamics and kinetics. It is demonstrated that the hierarchically hollow interior structure, strong adsorb ability of Co 3 O 4 toward polysulfides and three-dimensional (3D) inter-connected conductive carbon framework are responsible for the high areal capacity, fast redox kinetics and cycling durability.
研究领域:
材料科学
·
电化学
·
能源存储
·
纳米材料
·
电池技术
·
固态物理
·
表面化学
✓ 已验证
DOI
高影响因子
危险品化学品经营许可证（带存储）