JOURNAL OF THE ELECTROCHEMICAL SOCIETY
·
2018
·Vol. 166
·期 3
·A5075
·
IF 3.662
Bizhe Su,Jiaolong Zhang,Manabu Fujita,Wenchong Zhou,Patrick H.-L. Sit,Denis Y. W. Yu
Recent experimental and theoretical studies on the family of Li-rich layered materials show that they can deliver much higher capacities than traditional Li-transitional metal oxides. This also leads to great interests in Na-rich layered oxides as alternative positive electrode materials for sodium-ion batteries for large-scale energy storage. Herein, we report a Na-rich material, Na2SeO3 with an unconventional layered structure as a positive electrode material in NIBs for the first time. This material can deliver a discharge capacity of 232 mAh g−1 after activation, one of the highest capacities from sodium-based positive electrode materials. X-ray photoelectron spectroscopy indicates the oxidation state of selenium remains unchanged during the charge process. Theoretical simulation shows that after removal of Na, spin is situated around oxygen atoms near the Na vacancy, and the projected density of state of oxygen electron is close to the Fermi level. These suggest the involvement of oxygen during charge-discharge. This work will propel new searches of high-capacity sodium-based positive electrode materials.
研究领域:
材料科学
·
电化学
✓ 已验证
DOI
高影响因子
CERAMICS INTERNATIONAL
·
2021
·
IF 4.527
Jitong Wang,Xinru Nie,Zhanhui Peng,Xiaoping Lei,Pengfei Liang,Zupei Yang,Xiaolian Chao
Lead-free antiferroelectric (AFE) NaNbO 3 (NN) is one of promising materials for dielectric capacitors, but the recoverable energy-storage density and efficiency get restrained owing to huge remanent polarization and limited dielectric breakdown field strength . In this work, a variety of NN based lead-free bulk (1- x )NaNbO 3 - x La(Mn 0.5 Ni 0.5 )O 3 (abbreviated as (1- x )NN- x LMN, x = 0, 0.05, 0.10, 0.15, 0.20) ceramics were designed using a solid-state synthesis method. Remarkably, an ultra-fast charge-discharge speed 47 ns and an acceptable recoverable energy-storage density W rec ~1.77 J/cm 3 with a high efficiency η = 77% were obtained under the E b of 200 kV/cm at x = 0.05. The superior energy storage performance is attributed to the regulation of domain size and voltage resistance by special ions substitution of A and B sites. This work not only proposes an efficient strategy to realize high recoverable energy-storage density and efficiency, but also provide an candidate material for application of advanced pulsed power capacitors.
研究领域:
材料科学
·
能源存储
✓ 已验证
产品关联
DOI
高影响因子
JOURNAL OF ALLOYS AND COMPOUNDS
·
2021
·
IF 5.316
Rui Jia Liu,Ling Xu Yang,Ying Wang,Hui Jun Liu,Chao Liu Zeng
Vanadium-based MXenes are prospective as anode materials in energy-storage devices including lithium-ion batteries (LIBs) but limited by their charge-discharge capacities. Herein, partially-etched V 2 Al x CT z with the average particle size of ~400 nm was synthesized using 40 wt% HF or mixed NaF+HCl solutions as etchants, respectively. V 2 Al x CT z etched by 40 wt% HF for 96 h at room temperature (RT) has more exceptional charge-discharge performances against mixed NaF+HCl solutions, with an average reversible capacity of ~450 mAh g −1 at 0.1 A g −1 in the 120 cycles and ~301.2 mAh g −1 at 0.5 A g −1 after 200 cycles in LIBs. The effect of etchants on electrochemical performances and lithium-ion (Li-ion) storage mechanism of V 2 Al x CT z was discussed comprehensively. Additionally, a Li-ion full cell using LiFePO 4 as cathode has exhibited excellent electrochemical performance (150.4 mAh g −1 at 0.1 C). This work illustrates that partially-etched V 2 Al x CT z with the submicro-sized distribution is also a promising anode material for LIBs.
研究领域:
材料科学
·
电化学
✓ 已验证
产品关联
DOI
高影响因子
Journal of Energy Storage
·
2022
·
IF 8.907
Hongmei Qin,Man Liu,Ziwei Li,Yuheng Fu,Jinhui Song,Jian Xie,Chuanxi Xiong,Shan Wang
Cycloolefin copolymer (COC) could be a best promising commercial polymer dielectric for metallized film capacitors at elevated temperature according to the molecular structure, but the dielectric energy storage about COC remains a huge challenge due to the lack of processing strategies of its ultrathin films . Herein, we demonstrate that COC dielectric film of around 10 μm can be fabricated by solution casting followed by uniaxial stretching and steadily service at 140 °C. Excitedly, the charge-discharge efficiency ( η ) of COC film is up to 97.8 % at 600 MV/m at 25 °C, which is superior to the commercially available biaxially oriented polypropylene (BOPP). Remarkably, at 140 °C, COC film exhibits a maximum discharge energy density ( U e ) of 2.32 J/cm 3 and a η of 85.7 %, far outperforming the heat-resistant polyimide (PI) with a maximum U e of 1.00 J/cm 3 and a η of 24.1 %. Our work provides a novel strategy for the manufacture of ultrathin COC film and could promote the commercialization of high-temperature polymer capacitor films for the energy storage.
研究领域:
材料科学
·
能源存储
✓ 已验证
产品关联
DOI
高影响因子
CERAMICS INTERNATIONAL
·
2021
·
IF 4.527
Xinyu Zhao,Chongyang Li,Jikang Liu,Yuqing Ding,Wangfeng Bai,Peng Zheng,Peng Li,Jingji Zhang,Jiwei Zhai
High energy storage and charge-discharge performances under low electric field are desirable for lead-free dielectric materials because of environmental hazards, the risk of high voltage and the high cost of insulation technology. Herein, lead-free ceramics based on 0.6BNT-0.4Sr 0.775 Bi 0.15 TiO 3 (BNT-SBT) were designed, which simultaneously achieves a large energy storage density ( W rec ~ 2.41 J/cm 3 ) and a high efficiency ( η ~87.5%) under a low electric field of 190 kV/cm due to enhanced dielectric properties and the relaxation response. Moreover, the energy storage properties of the BNT-SBT ceramic exhibit moderate temperature stability, excellent frequency dependence, and cycling reliability. Furthermore, the charge-discharge performance simultaneously features a high power density ( P D ~51.4 MW/cm 3 ), an ultrafast discharge speed ( t 0.9 –77 ns), and remarkable stability against temperature and cycling. This study exploits a high-efficiency BNT-related ceramics with concurrently high energy storage and charge-discharge performances under low electric fields, which provides great potential in practical dielectric capacitor applications.
研究领域:
材料科学
·
电介质物理
✓ 已验证
产品关联
DOI
高影响因子
ELECTROCHEMISTRY COMMUNICATIONS
·
2017
·
IF 4.396
Wei Yu,Wei Yang,Ruliang Liu,Lei Qin,Yu Lei,Liang Liu,Dengyun Zhai,Baohua Li,Feiyu Kang
In this study, a phenolic antioxidant of 2,6-di- tert -butyl-hydroxytoluene (BHT) is applied in Li-O 2 batteries to simultaneously improve discharge capacity and reduce charge overpotential. BHT exhibits a redox couple at ~ 3.0 V (vs. Li + /Li), which is extremely close to the thermodynamic potential of a Li-O 2 battery (2.96 V). The unique chemical and electrochemical behaviors of BHT contribute to the improvement on both oxygen reduction reaction and oxygen evolution reaction performances. These factors lead to the notable enhancement of discharge capacity (capacity increases by 72%) and the reduction of charge plateau (the plateau is 3.2 V and 4.2 V, respectively, with and without BHT) for Li-O 2 batteries. Furthermore, in-situ X-ray diffraction results confirm that the BHT-mediated formation and decomposition of Li 2 O 2 , rather than parasitic reactions, dominate the discharge and charge processes. The results provide a new approach for exploiting appropriate soluble mediators for rechargeable Li-O 2 batteries.
研究领域:
材料科学
·
电化学
✓ 已验证
产品关联
DOI
高影响因子
Nanomaterials
·
2021
·Vol. 11
·期 9
·2332
·
IF 5.076
Qiangqiang Feng,Yanyan Liu,Jitong Yan,Wei Feng,Shaozheng Ji,Yongfu Tang
A promising aqueous aluminum ion battery (AIB) was assembled using a novel layered K2Ti8O17anode against an activated carbon coated on a Ti mesh cathode in an AlCl3-based aqueous electrolyte. The intercalation/deintercalation mechanism endowed the layered K2Ti8O17as a promising anode for rechargeable aqueous AIBs. NaAc was introduced into the AlCl3aqueous electrolyte to enhance the cycling stability of the assembled aqueous AIB. The as-designed AIB displayed a high discharge voltage near 1.6 V, and a discharge capacity of up to 189.6 mAh g−1. The assembled AIB lit up a commercial light-emitting diode (LED) lasting more than one hour. Inductively coupled plasma–optical emission spectroscopy (ICP-OES), high-resolution transmission electron microscopy (HRTEM), and X-ray absorption near-edge spectroscopy (XANES) were employed to investigate the intercalation/deintercalation mechanism of Na+/Al3+ions in the aqueous AIB. The results indicated that the layered structure facilitated the intercalation/deintercalation of Na+/Al3+ions, thus providing a high-rate performance of the K2Ti8O17anode. The diffusion-controlled electrochemical characteristics and the reduction of Ti4+species during the discharge process illustrated the intercalation/deintercalation mechanism of the K2Ti8O17anode. This study provides not only insight into the charge–discharge mechanism of the K2Ti8O17anode but also a novel strategy to design rechargeable aqueous AIBs.Keywords:aluminum ion battery;K2Ti8O17anode;discharge–charge mechanism
研究领域:
材料科学
·
电化学
✓ 已验证
产品关联
DOI
PubMed
高影响因子
RARE METALS
·
2025
·
IF 11
Han Chen-Chen,Bu Ling-Yi,Shi Feng,Wei De-Qi,Wang Kun-Yan,Gao Zi-Wei,Su Zhong,Lai Chao,Su Zhi
Fast-charging technology is indeed a critical technical problem for electric vehicles today. Improving the conductivity of electrode materials is one of the effective ways to solve this technical bottleneck. Here, we incorporated highly conductive MXene and carbon nanotubes into the electrode materials of Li 4 Ti 5 O 12 (LTO) and LiFePO 4 (LFP) to construct the composite electrode material 3D-LTO-CNT-MXene and 3D-LFP-CNT-MXene (named 3D-LTO and 3D-LFP). The 3D-LTO we synthesized demonstrated an impressive capacity of 146.2 mAh g −1 at a 20C rate (where 1C = 175 mA g −1 ), the 3D-LFP material exhibited a capacity of 104.6 mAh g −1 at a 20C rate (where 1C = 170 mA g −1 ). This remarkable rate capability can be attributed to the constructed three-dimensional conductive network, which facilitates enhanced electrical conductivity and electron migration rates, thereby promoting rapid charging and discharging of the batteries. Furthermore, we assembled a 3D-LTO||3D-LFP full cell, which demonstrated exceptional performance at a high rate of 10C (1C = 170 mA g −1 ), achieving an energy density of 68.34 Wh kg −1 and a power density of 1547.5 W kg −1 . This work demonstrates the feasibility of constructing 3D highly conductive electrode materials for rapid charging and discharging at high rates. It paves the way for the commercial application of truly ultra-fast charging in electric vehicles. Graphical abstract
研究领域:
材料科学
·
能源技术
✓ 已验证
产品关联
DOI
高影响因子
Journal of Materials Chemistry C
·
2025
·
IF 5.1
Jiayang Han,Fuxing Zhai,Dingyu Zheng,Lixin Xu,Huijian Ye
High-temperature film capacitor with large energy density and charge-discharge efficiency is urgent to be developed to fulfill the requirement of energy storage system. In this work, a semi-crystal polyimide (PI) with the fluorine-containing pendant group has been synthesized, and the high-temperature electrical displacement and breakdown behavior of PI film are investigated systematically. The evolution of crystal structure in PI film is evaluated by XRD and density function theory simulation. The lattice distortion caused by the large pendant group contributes to the free volume inside PI bulk. The optimized PI film demonstrates an energy density of 8.0 J cm-3 with a charge-discharge efficiency of 90% at 500 MV m-1 and 150 °C. The ultrahigh energy storage capability under high temperature is attributed to the combination of broad bandgap and free volume effect in the condense state. The presence of –CF3 effectively hinders the diffusion of charge carriers under the action of the applied field, which results in the enhanced dielectric reliability. This semi-crystal PI film with fluorinated pendant group illustrates the improved high-temperature energy storage performance, which sheds a light on the exploration of the depression of energy loss for polymer film capacitor.
研究领域:
材料科学
·
能源存储
✓ 已验证
产品关联
DOI
高影响因子
Small
·
2018
·Vol. 15
·期 5
·1804158
·
IF 9.598
Lei Liu,Yu Chen,Yihao Xie,Peng Tao,Zijing Wang,Qingyi Li,Kexin Wang,Chenglin Yan
Slow ion kinetics of negative electrode materials is the main factor of limiting fast charge and discharge of batteries. Sluggish Na + kinetics property leads to large electrode polarization, resulting in poor rate and cyclic performances. Herein, an electrode of ultrasmall tin nanoparticles decorated in N, S codoped carbon monolith (TCM) with exceptional high-rate capability and ultrastable cycling behavior for Na-storage is reported. The resulted TCM electrode exhibits an extremely high retention of 96% initial charge capacity after 500 cycles at a current density of 500 mA g −1 . Significantly, when the current density is elevated to an ultrahigh rate of 5000 mA g −1 , a high reversible capacity of 228 mAh g −1 after the 2000th cycle is still maintained. More importantly, the stable and fast Na-storage of TCM is investigated and understood by experimental characterizations and kinetics calculations, including interfacial ion/electron transport behavior, ion diffusion, and quantitative pseudocapacitive analysis. These investigations elucidate that the TCM shows improved ion/electron conductivity and enhanced interfacial kinetics. An entirely new perspective to deep insights into the fast ion/electron transport mechanisms revealed by interfacial kinetics of sodiation/desodiation, which contributes to the profound understanding for developing fast charging/discharging and long-term stable electrodes in sodium-ion batteries, is provided.
研究领域:
材料科学
·
电化学
✓ 已验证
产品关联
DOI
PubMed
高影响因子
JOURNAL OF COLLOID AND INTERFACE SCIENCE
·
2021
·
IF 8.128
Weibo Shi,Mengcheng Tang,Wenwen Deng,Peiyuan Li,Xiaogang Yang,Hongfei Huang,Peng Du,Jie Liu,Chang Ming Li
We fabricated a potassium-ion battery by using 11,11,12,12-tetracyano-9,10-anthraquinonedimethane (TCAQ) as the cathode for the first time. Owing to the unique molecular structure and configuration of ionic liquid electrolytes, TCAQ shows a high redox potential of 2.6 V vs. K + /K while delivering a capacity of 88 mAh g −1 at a current density of 17 mA g −1 and a capacity retention of 61% after 50 cycles. The mechanism of the reaction of TCAQ with K was investigated. The results prove that TCAQ holds great promise for broad applications in potassium-ion batteries while revealing new scientific insights into K + -organic cathode batteries.
研究领域:
材料科学
·
电化学
✓ 已验证
DOI
PubMed
高影响因子
JOURNAL OF ELECTROANALYTICAL CHEMISTRY
·
2024
·
IF 4.1
Peng Yang,Lulu Xu,Yourong Tao,Wenxin Wang,Xingcai Wu,Dunming Zhang
Here, Ni 2+ -doped Na 2 Ti 6 O 13 nanotubes (NNTONT) were successfully synthesized by a simple hydrothermal ultrasound method. It could be found that Na 2 Ti 6 O 13 partly transformed to TiO 2 with the addition of Ni 2+ , and affected the electrochemical properties of sodium ion batteries (SIBs). When the added Ni source got to 40 wt% (NNTONT-40), the capacity of charge–discharge approached the best value: 130.4 mAh/g after 100 cycles at 1C (1C = 177 mA g −1 in this paper), and increased by 41 % compared with undoped NTONT (92.2 mAh/g), and increased by 76 % even at a high rate (10C) after 1000 cycles. Subsequently, the analyses of CV (cyclic voltammetry), EIS (AC impedance spectrum) and GITT (galvanostatic intermittent titration technique) confirmed that Ni 2+ -doping resulted in lower Na + insertion-extraction voltage, smaller charge transfer resistance and higher ion diffusion rate and lager BET specific surfaces. Therefore, Ni 2+ -doping is an effective strategy to improve the capacity, rate performance and energy density, which is a promising SIBs’ anode material.
研究领域:
材料科学
·
电化学
✓ 已验证
产品关联
DOI
高影响因子
危险品化学品经营许可证（带存储）