CERAMICS INTERNATIONAL
·
2022
·
IF 5.532
Caiyan Yu,Linying Yang,Shuwei Sun,Di Chen,Yanfeng Yin,Hui Ying Yang,Ying Bai
Due to their high theoretical specific capacities and good structural compatibility, O3-layered oxides are considered as high-performance cathode candidates for sodium-ion batteries. However, serious side reactions and structural degradation during long-term cycling have greatly hindered their practical applications. Herein, O3-type NaNi 0.5 Mn 0.5 O 2 (NNMO) was prepared by partially substituting Ni 2+ with Cu 2+ and inducing CuO surface coating to enhance the structural stability without sacrificing the high capacity. In Particular, Cu 2+ incorporated at a molar ratio of 0.10 greatly improved the electrochemical performance of pristine NNMO. The NaMn 0.5 Ni 0.4 Cu 0.1 O 2 electrode exhibited a capacity retention of 64.5% after 300 cycles at 0.5 C. Microscopic and spectral studies revealed that the CuO coating layer suppressed detrimental side reactions upon cycling. Moreover, the bulk doping of Cu 2+ ultimately enhanced the structural stability by mitigating irreversible phase transitions. Hence, the integration of bulk Cu 2+ doping and CuO surface coating contributed to the increased structural stability and electrochemical performance of NNMO. The doping and coating dual-modification strategy established in this work effectively suppressed the side reactions and structural degradation of NNMO, and this work provides new insight into the effective design of electrode microstructures for use in high-performance batteries.
研究领域:
材料科学
·
能源存储
✓ 已验证
DOI
高影响因子
JOURNAL OF POWER SOURCES
·
2020
·
IF 8.247
Chongyang Hao,Lina Chen,Yamin Zhang,Xiaowen Zheng,Linna Dai,Lijie Ci
Cations preintercalation is an effective way to optimize the crystal structure and improve the electrochemical behavior. An Ag + pre-intercalated Ag x MnO 2 material with ultrafine nanowire structure is prepared by a facile hydrothermal method . With optimized crystalline microstructure including expanded interlayer space and introduced multivalence of Mn, the as-prepared material exhibits superior performance as cathode for both Li-ion and Na-ion hybrid supercapacitors (HSCs). High specific capacitance of 424.7 F g −1 in Li 2 SO 4 electrolyte and 450.1 F g −1 in Na 2 SO 4 system are achieved. The assembled HSCs using Ag x MnO 2 and activated carbon (YEC-8A) as electrode materials deliver a wide operation potential window of 0–2.2 V and a high energy density of 204.30 Wh kg −1 at the power density of 167.15 W kg −1 for Li-ion HSCs and 131.08 Wh kg −1 at 107.25 W kg −1 for Na-ion HSCs. Furthermore, the as-fabricated HSCs deliver excellent cyclic stability. The capacitance retention is 79.4% after 20,000 cycles for Li-ion HSC and 84.9% after 10,000 cycles for Na-ion HCS .
研究领域:
材料科学
·
电化学
✓ 已验证
DOI
高影响因子
ACS Applied Materials & Interfaces
·
2018
·
IF 8.097
Xuemin Yin,Hejun Li,Haiqi Wang,Zhiyong Zhang,Ruimei Yuan,Jinhua Lu,Qiang Song,Jian-Gan Wang,Leilei Zhang,Qiangang Fu
Prussian blue (PB) and its analogues (PBA), especially with hollow structures, have attracted growing attention from the researchers of energy storage field. Herein, we have developed a facile self-templating method to synthesize hollow-structured cobalt hexacyanoferrate (CoHCF) with controllable morphologies by using water-soluble precursors as templates. The method is versatile and can be extended to synthesize various PB/PBA hollow structures with tunable composition and morphology. Profiting from the unique hollow structure, the CoHCF hollow prisms manifest exceptional electrochemical performance in the Na2SO4 aqueous electrolyte, including a high specific capacitance (284 F g–1 at 1 A g–1), a high rate capability, and an excellent cycling stability (92% retention after 5000 cycles). A hybrid supercapacitor device assembled with the CoHCF hollow prisms and activated carbon shows a high specific density of 47 W h kg–1 at a specific power of 1000 W kg–1 and stable cycling performance.
研究领域:
材料科学
·
能源存储
✓ 已验证
DOI
高影响因子
ACS Applied Materials & Interfaces
·
2023
·
IF 9.5
Yu Rao,Kongjun Zhu,Guoliang Zhang,Feng Dang,Jiatao Chen,Penghua Liang,Zhihan Kong,Jun Guo,Hongjuan Zheng,Jie Zhang,Kang Yan,Jinsong Liu,Jing Wang
Molybdenum sulfide has been widely investigated as a prospective anode material for Li+/Na+ storage because of its unique layered structure and high theoretical capacity. However, the enormous volume variation and poor conductivity limit the development of molybdenum sulfide. The rational design of a heterogeneous interface is of great importance to improve the structure stability and electrical conductivity of electrode materials. Herein, a high-temperature mixing method is implemented in the hydrothermal process to synthesize the hybrid structure of MoS2/V2O3@carbon-graphene (MoS2/V2O3@C-rGO). The MoS2/V2O3@C-rGO composites exhibit superior Li+/Na+ storage performance due to the construction of the interface between the MoS2 and V2O3 components and the introduction of carbon materials, delivering a prominent reversible capacity of 564 mAh g–1 at 1 A g–1 after 600 cycles for lithium-ion batteries and 376.3 mAh g–1 at 1 A g–1 after 450 cycles for sodium-ion batteries. Theoretical calculations confirm that the construction of the interface between the MoS2 and V2O3 components can accelerate the reaction kinetics and enhance the charge-ionic transport of molybdenum sulfide. The results illustrate that interfacial engineering may be an effective guide to obtain high-performance electrode materials for Li+/Na+ storage.
研究领域:
材料科学
·
电化学
✓ 已验证
DOI
高影响因子
Nanoscale
·
2018
·Vol. 10
·期 46
·21671-21680
·
IF 7.233
Wenbin Li,Jianfeng Huang,Liangliang Feng,Liyun Cao,Shuwei He
Surface structure plays a decisive role in the surface capacity and electrochemical kinetics of rechargeable batteries. Tuning the surface structure of building blocks has been considered to be a new effective strategy to promote the electrochemical performance of 3D self-assembled nanoarchitectures. Herein, VS4 microspheres assembled from the nano-units with different crystallinities are synthesized via a facile template-free hydrothermal method. The results show that the electrochemical performance of VS4 microspheres as anode materials for sodium-ion batteries (SIBs) largely depends on their crystallinity, and a VS4 electrode with the lowest crystallinity delivers a high reversible capacity of 412 mA h g−1 at 0.2 A g−1 after 230 cycles and that of 345 and 293 mA h g−1 even at 1.0 and 2.0 A g−1, respectively. The insertion mechanism is revealed within the selected voltage window of 0.50–3.00 V. Further analysis suggests that decreasing the crystallinity of the nano-units can dramatically enhance the pseudocapacitive behavior of VS4 microspheres, which takes the main responsibility for the improvement of sodium storage properties. This work can provide a new insight for the exploration and design of high-performance anodes for SIBs.
研究领域:
材料科学
·
电化学
✓ 已验证
DOI
高影响因子
JOURNAL OF THE ELECTROCHEMICAL SOCIETY
·
2022
·Vol. 169
·期 5
·056523
·
IF 4.386
Chuanhui Zhu,Guo-Hong Cai,Chongyang Yuan,Bin Huang,Guangqin Li,Mark Croft,Martha Greenblatt,Man-Rong Li
Exploring a simple model system to realize the intrinsic guidelines of activity for oxide electrocatalysts is urgent and important. Here, we introduce delafossite oxides A2IrO3 (A = Li, Na, Cu) as a family of oxygen evolution reaction electrocatalysts in alkaline media. We show that, in Cu2IrO3, the intrinsic intersite charge transfer between Cu and Ir improves the electrocatalytic activity by simultaneously increasing the conductivity and reducing the Tafel slope down to 51 mV dec−1 with an overpotential η10 = 361 mV. Through a comparative study, the improved activity of Cu2IrO3 is attributed to the increase of Ir 5d projected electronic density of states with extended Ir–O bond length. This study provides insights into advanced catalyst design through tailoring the active site of oxides by the modulation of electronic states in a given structural motif.
研究领域:
材料科学
·
电化学
·
催化科学
✓ 已验证
DOI
高影响因子
CERAMICS INTERNATIONAL
·
2022
·
IF 5.532
Xupeng Yuan,Yangyang Zhang,Lijiao Gong,Baoqing Li,Ling Zhang
NaNbO 3 -based lead-free ferroelectric ceramics are considered to be one of the most promising energy storage materials . In this paper, The (1- x )Na(Nb 0 · 95 Ta 0.05 )O 3 - x (Bi 0 · 5 Na 0.5 )TiO 3 ceramics have been investigated in detail. The SEM images presented that the addition of BNT obviously improved the bulk densities which reached a maximum at x = 0.4, corresponding to a high breakdown field strength of 240 kV/cm. The XRD patterns showed that the strongest diffraction peak was observed in the case of x = 0.4 and 2 θ = 33.2°, implying that the two phases formed a superior mutual solubility, because of which a significant polarization intensity of 38.2 μC/cm 2 was obtained. As a result, the 0.6NaNbO 3 -0.4(Bi 0 · 5 Na 0.5 )TiO 3 ceramics exhibited an excellent discharge energy density of 3.607 J/cm 3 , while the energy storage efficiency was calculated to be 72%.
研究领域:
材料科学
·
陶瓷与复合材料
·
能量存储
·
铁电材料
✓ 已验证
DOI
高影响因子
MATERIALS RESEARCH BULLETIN
·
2024
·
IF 5.3
Jiaping Guan,Guomin Sun,Gaoyuan Yu,Yu Chen,Jiawen Wei,Xiaohui Zhu,Xiaogu Huang
Sodium-ion batteries (SIBs) have garnered significant interest due to their cost-effectiveness and operational similarities to lithium-ion batteries. Amongst the various components, the cathode plays a pivotal role in determining the energy density of these batteries. Mn-based layered oxides stand out as promising cathode materials, owing to their abundance and non-toxicity. However, these oxides tend to suffer from structural instability during high-voltage cycling, leading to a decline in capacity. In this work, we have designed Ce-doped Na 0.6 Li 0.2 Mn 0.79 Ce 0.01 O 2 cathodes through a solid-state reaction process. This innovation aims to inhibit undesirable phase transitions and enhance the electrochemical performance of the electrodes. By integrating electrochemical testing with a suite of characterization techniques, we have shown that 1 mol% Ce doping effectively suppresses the formation of birnessite and the irreversible oxygen redox reactions in the high-voltage region. Moreover, our findings indicate that the detrimental phase transitions can be significantly mitigated throughout the electrochemical cycling process, thereby bolstering structural stability. Notably, the capacity of the Ce-doping cathode after 20 cycles substantially exceeds its initial discharge specific capacity, reaching 169.3 mAh g –1 . This research introduces a strategy for stabilizing the cathode structure of P2-type Mn-based layered oxides through Ce-doping, offering valuable insights for the advancement of next-generation SIBs.
研究领域:
材料科学
·
电化学
·
能源存储
·
无机化学
·
固态化学
✓ 已验证
DOI
高影响因子
Small
·
2019
·Vol. 15
·期 46
·1903873
·
IF 10.856
Ya-Qian Wu,Hui-Xian Yang,Yu Yang,Hao Pu,Wen-Jie Meng,Rui-Ze Gao,Dong-Lin Zhao
SnS 2 has been widely studied as an anode material for sodium-ion batteries (SIBs) based on the high theoretical capacity and layered structure. Unfortunately, rapid capacity decay associated with volume variation during cycling limits practical application. Herein, SnS 2 /Co 3 S 4 hollow nanocubes anchored on S-doped graphene are synthesized for the first time via coprecipitation and hydrothermal methods. When applied as the anode for SIBs, the sample delivers a distinguished charge specific capacity of 1141.8 mAh g −1 and there is no significant capacity decay (0.1 A g −1 for 50 cycles). When the rate is increased to 0.5 A g −1 , it presents 845.7 mAh g −1 after cycling 100 times. Furthermore, the composite also exhibits an ultrafast sodium storage capability where 392.9 mAh g −1 can be obtained at 10 A g −1 and the charging time is less than 3 min. The outstanding electrochemical properties can be ascribed to the enhancement of conductivity for the addition of S-doped graphene and the existence of p–n junctions in the SnS 2 /Co 3 S 4 heterostructure. Moreover, the presence of mesopores between nanosheets can alleviate volume expansion during cycling as well as being beneficial for the migration of Na + .
研究领域:
材料科学
·
电化学
·
纳米科技
·
能源存储
·
无机化学
✓ 已验证
DOI
高影响因子
JOURNAL OF ALLOYS AND COMPOUNDS
·
2023
·
IF 6.2
Lingyi Ding,Youzhong Dong,Qiuchen Lu,Hongyan Zhou,Qinghua Fan,Quan Kuang,Yanming Zhao
Layered vanadium oxides , due to their high specific capacity and the multiple oxidation states of vanadium, are attractive candidates as cathode materials for sodium-ion batteries (SIBs). To meet the requirements of increasing interlayer spacing and significantly improving structural stability, herein, nickel pre-intercalated bilayer vanadium pentoxide hydrate, Ni 0.28 V 2 O 5 ∙0.62 H 2 O (referred to as NVO) is synthesized successfully. The interlayer water molecules significantly increase the interlayer distance of the bilayer vanadium pentoxide. At the same, by forming a stable interlayer NiO 6 octahedron, the intercalated Ni atoms effectively relieve the big change of volume during the Na ions insertion/extraction process and effectively inhibit the interlayered water molecules escape in charge/discharge process. Due to the big interlayer distance and excellent structural stability, the NVO electrode exhibits an excellent electrochemical performance. Except for the first few cycles, a high reversible capacity of about 260 mAh g −1 is obtained and the mean fade is only 0.5% per cycle. In addition, the excellent Na storage mechanism of the NVO electrode is also explored in detail by in situ XRD.
✓ 已验证
DOI
高影响因子
JOURNAL OF COLLOID AND INTERFACE SCIENCE
·
2023
·
IF 9.9
Renwei Jing,Jun Yang,Xinran Zhao,Yiting Wang,Panrun Shao,Minjie Shi,Chao Yan
Organic compounds have become an important electrode material for aqueous electrochemical energy storage. However, organic electrodes still face poor performance in aqueous batteries due to insufficient electrochemical activity. In this work, a novel conjugated quinone compound containing a rich carbonyl group was designed. The quinone compound was synthesized by a simple dehydration reaction of pyrene-4,5,9,10-tetrone (PTO) and 1,2-diaminoanthraquinone (1,2-AQ); it contains 4 pyrazines (C N) from AQ and 4 carbonyl groups (C O), as well as a large number of active sites and the excellent conductivity brought by its conjugated structure ensures the high theoretical capacity of PTO-AQ. In the context of aqueous sodium ion batteries (ASIBs), the electrode material known as PTO-AQ exhibits a notable reversible discharge capacity of 117.9 mAh/g when subjected to a current density of 1 A/g; impressively, it maintained a capacity retention rate of 74.3 % even after undergoing 500 charge and discharge cycles, a performance significantly surpassing that of pristine PTO and AQ. Notably, PTO-AQ exhibits a wide operating voltage range (-1.0–0.5 V) and a cycle life of up to 10,000 cycles. In situ Raman and ex situ measurements were used to analyze the structural changes of PTO-AQ during charge and discharge and the energy storage mechanism in NaAC. The effective promotion of Na + storage brought by a rich carbonyl group was obtained. The structural energy level and electrostatic potential of PTO-AQ were calculated, and the active center distribution of PTO-AQ was obtained. This work serves as a guide for designing high-performance aqueous organic electrode materials that operate across a wide voltage range while also explaining their energy storage mechanism.
✓ 已验证
DOI
高影响因子
Advanced Energy Materials
·
2017
·Vol. 7
·期 15
·1700087
·
IF 16.721
Ting Jin,Yongchang Liu,Yang Li,Kangzhe Cao,Xiaojun Wang,Lifang Jiao
NaVPO 4 F has received a great deal of attention as cathode material for Na-ion batteries due to its high theoretical capacity (143 mA h g −1 ), high voltage platform, and structural stability. Novel NaVPO 4 F/C nanofibers are successfully prepared via a feasible electrospinning method and subsequent heat treatment as self-standing cathode for Na-ion batteries. Based on the morphological and microstructural characterization, it can be seen that the NaVPO 4 F/C nanofibers are smooth and continuous with NaVPO 4 F nanoparticles (≈6 nm) embedded in porous carbon matrix. For Na-storage, this electrode exhibits extraordinary electrochemical performance: a high capacity (126.3 mA h g −1 at 1 C), a superior rate capability (61.2 mA h g −1 at 50 C), and ultralong cyclability (96.5% capacity retention after 1000 cycles at 2 C). 1D NaVPO 4 F/C nanofibers that interlink into 3D conductive network improve the conductivity of NaVPO 4 F, and effectively restrain the aggregation of NaVPO 4 F particles during charge/discharge process, leading to the high performance.
研究领域:
材料科学
·
电化学
·
纳米技术
·
能源存储
·
无机非金属材料
·
固态化学
✓ 已验证
DOI
高影响因子
危险品化学品经营许可证（带存储）