Advanced Energy Materials
·
2018
·Vol. 8
·期 15
·1703217
·
IF 21.875
Panxing Bai,Yongwu He,Xiaoxi Zou,Xinxin Zhao,Peixun Xiong,Yunhua Xu
Hard carbons (HCs) are the most promising candidate anode materials for emerging Na-ion batteries (NIBs). HCs are composed of misaligned graphene sheets with plentiful nanopores and defects, imparting a complex correlation between its structure and sodium-storage behavior. The currently debated mechanism of Na + -ion insertion in HCs hinders the development of high-performance NIBs. In this article, ingenious and reliable strategies are used to elaborate the correlation between the structure and electrochemical performance and further illuminate the sodium-storage mechanism in HCs. First, filling sulfur into the micropores of HCs can remove the low-voltage plateau, providing solid evidence for its association with the pore-filling mechanism. Along with the decreased concentration of defects/heteroatoms at higher treatment temperature, the reduced sloping capacity confirms the adsorption mechanism in the sloping region. Finally, the similar sodium-insertion behaviors of HCs with ether-based and ester-based electrolytes indicate that no Na + ions intercalate between the graphene layers. The determined adsorption-pore-filling mechanism encourages the design of more efficient HC anode materials with high capacity for high-energy NIBs.
研究领域:
材料科学
·
电化学
✓ 已验证
产品关联
DOI
高影响因子
Scientific Reports
·
2022
·Vol. 12
·期 1
·1-10
·
IF 4.996
Tan Meina,Qin Yang,Wang Yiping,Zhang Fazhi,Lei Xiaodong
We propose a new Cu–Al dual-ion battery that aqueous solution composed of LiCl, CuCl and AlCl 3 (LiCuAl) is used as the electrolyte, CuS is used as the cathode of aqueous aluminum ion battery for the first time and copper foil is used as the anode. The assembled Cu–Al dual-ion battery yields a reversible capacity of 538 mA h/g at 200 mA/g, and exhibits longterm cycling stability of over 200 cycles with 88.6% capacity retention at 1000 mA/g. Above excellent performance is inseparable from the three components of LiCuAl electrolyte and electrode materials. The Al-storage mechanism of CuS is proposed that the S–S bond in CuS lattice interacts with aluminum ions during the aluminum storage process. In addition, the charging and discharging process does not cause irreversible damage to the S–S bond, thus Cu–Al dual-ion battery with CuS as cathode shows great cycle stability.
研究领域:
电化学
·
材料科学
·
能源存储
✓ 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
·
纳米材料
·
界面化学
·
应用物理
✓ 已验证
DOI
高影响因子
Journal of Magnesium and Alloys
·
2023
·
IF 17.6
Junjun Wang,Ruohan Yu,Jianxiang Wang,Juncai Long,Fan Qiao,Lei Zhang,Guanjie He,Qinyou An,Liqiang Mai
Bismuth has garnered significant interest as an anode material for magnesium batteries (MBs) because of its high volumetric specific capacity and low working potential. Nonetheless, the limited cycling performance (≤100 cycles) limits the practical application of Bi as anode for MBs. Therefore, the improvement of Bi cycling performance is of great significance to the development of MBs and is also full of challenges. Here, Bi nanoparticles encapsulated in nitrogen-doped carbon with single-atom Bi embedded (Bi@NC) are prepared and reported as an anode material for MBs. Bi@NC demonstrates impressive performance, with a high discharge capacity of 347.5 mAh g −1 and good rate capability (206.4 mAh g −1 @500 mA g −1 ) in a fluoride alkyl magnesium salt electrolyte. In addition, Bi@NC exhibits exceptional long-term stability, enduring 400 cycles at 500 mA g −1 . To the best of our knowledge, among reported Bi and Bi-based compounds for MBs, Bi@NC exhibits the longest cycle life in this work. The magnesium storage mechanism of Bi@NC is deeply studied through X-ray diffraction, transmission electron microscopy and X-ray photoelectron spectroscopy. This work provides some guidance for further improving the cycling performance of other alloy anodes in MBs.
研究领域:
材料科学
·
电化学
·
能源存储
✓ 已验证
DOI
高影响因子
CHEMICAL ENGINEERING JOURNAL
·
2022
·
IF 16.744
Shiqi Ding,Xin Dai,Zhenjiang Li,Alan Meng,Lei Wang,Guicun Li,Shaoxiang Li
VS 4 is one of the most potential cathode materials candidates for magnesium ion batteries (MIBs). However, it is still challenging for suitably modifying VS 4 to make it process more excellent cycle and rate performance. Herein, modifying VS 4 with cation (Mo)/anion (O) co-doping (MVSO) enhances the electrical conductivity, generates rich sulfur and oxygen vacancies, induces the co-existence of V 3+ /V 4+ and regulates the morphology as hollow flower-like morphology. Benefitted from the advantages of co-doping of Mo and O, MVSO delivers the excellent electrochemical properties, such as the high specific capacity (140.5 mAh g −1 ) under 50 mA g −1 , ultralong cycling life about 1000 cycles with capacity retention ratio of 95.6%, superior rate capability (the capacity could achieve at 75.2 mAh g −1 , when the current density increases to 1000 mA g −1 ), and low self-discharge ratio. Furthermore, the fast reaction kinetics and high capacitive process contribution for MVSO unmasked by the galvanostatic intermittent titration technique (GITT) and pesudocapaticance-like contribution analysis are highlighted. Particularly, the intrinsic Mg 2+ storage mechanism and the high reversible properties caused by Mo-O co-doping is unveiled with comprehensive ex situ characterizations. These findings are supposed to open new avenues for designing cathode materials for applying in future energy storage devices.
研究领域:
材料科学
·
电化学
·
能源存储
✓ 已验证
产品关联
DOI
高影响因子
ACS Applied Materials & Interfaces
·
2021
·
IF 9.229
Jiapin Liu,Yun Huang,Zhixing Zhao,Wenhao Ren,Zhuangzhi Li,Chao Zou,Ling Zhao,Zhaomin Tang,Xing Li,Mingshan Wang,Yuanhua Lin,Haijun Cao
The sodium super ion conductor (NASICON) structure materials are essential for sodium-ion batteries (SIBs) due to their robust crystal structure, excellent ionic conductivity, and flexibility to regulate element and valence. However, the poor electronic conductivity and inferior energy density caused by the nature of these materials have always been obstacles to commercialization. Herein, using yeast as a template to derive NASICON structure Na3MnTi(PO4)3 (NMTP) materials (noted as Yeast@NMTP/C) is presented. The Yeast@NMTP/C material retains the microsphere morphology of the yeast template and not only controls the particle size (around 2 μm) to shorten the Na+ diffusion pathways but also improves the electronic conductivity to optimize the electrochemical kinetics. The Yeast@NMTP/C cathode delivers reversible multielectron redox reactions including Ti4+/3+, Mn3+/2+, and Mn4+/3+ and exhibits a high capacity of 108.5 mAh g–1 with a 79.2% capacity retention after 1000 cycles at a 2C rate. The sodium storage mechanism of Yeast@NMTP/C reveals that the addition of Ti4+/3+ redox plays a key role in improving the Na+ diffusion kinetics, and both solid-solution and two-phase reactions take place during the desodiation and sodiation process. Additionally, the high-rate and long-span cycle performance of Yeast@NMTP/C at 10C is ascribed to contribute to pseudocapacitance.
研究领域:
材料科学
·
电化学
·
电池技术
✓ 已验证
产品关联
DOI
PubMed
高影响因子
JOURNAL OF MOLECULAR LIQUIDS
·
2021
·
IF 6.165
Weichen Zhu,Yu Huang,Bo Jiang,Rengui Xiao
The strong self-discharge reaction is one of the key factors limiting the practical use of dual-ion batteries, which leads to low coulombic efficiency and discharge capacity loss. It is of great significance to effectively reduce the self-discharge effect through redox reactions between organic electrodes and electrolytes. Herein, a dual-ion battery study that uses 1,4,5,8-naphthalenetetracarboxylic dianhydride as the anode and 1-butyl-1-methylpyrrolidinium bis(trifluoromethylsulfonyl)imide as the electrolyte is conducted. Due to the introduction of organic materials, the storage mechanism of cations on the anode is changed, which weakens the self-discharge effect. The battery shows a low self-discharge rate of 6.12% h −1 and a high discharge capacity of 114 mAh g −1 . The voltage declines by only 0.14 V after resting for 15 h due to the strong redox reaction between Pyr 14 + cations and the C O groups of NTCDA. Meanwhile, a double-layer filter paper system with small porosity is used to improve the cycle performance of the battery.
研究领域:
能源存储
·
电化学
·
材料科学
✓ 已验证
DOI
高影响因子
危险品化学品经营许可证（带存储）