ELECTROCHIMICA ACTA
·
2024
·
IF 5.5
Wangqiong Xu,Beituo Liu,Shubiao Xia,Lijuan Chen,Ruijuan Qi,Qiling Li,Shimei Guo,Feixiang Cheng,Rong Huang,Zhe Li
Mo doping plays a striking role in the stability enhancement of LiMn 2 O 4 cathode materials. However, the underlying microscopic mechanism is still unclear. Here, we elucidate that the relationship between the atomic position of Mo doping in LiMn 2 O 4 and the stability enhancement of Mo-doped LiMn 2 O 4 by utilizing the spherical aberration-corrected scanning transmission electron microscopy (Cs-STEM). It exhibits that the part of Mo 6+ ions occupy empty Mn 16c site to form a surface reconstructed layer of rock-salt like phase on the outermost surface and other Mo 6+ ions dope into the Mn octahedral 16d sites to form LiMo x Mn 2-x O 4 in bulk, which is beneficial for inhibiting the parasitic side reactions. Concomitantly, this dual modification of bulk structure and surface can significantly enhance electrode reversibility and Li + diffusion. As a result, excellent long cycling stability of the as-designed optimal LiMo 0.01 Mn 1.99 O 4 after 1500 cycles with 61.61 % capacity retention at 10 C (1 C = 148 mAh g −1 ) is presented, with an initial discharge capacity of 88.30 mAh g −1 . Our research provides a clever approach for regulating the surface structure/bulk architecture in LiMn 2 O 4 cathode materials.
研究领域:
材料科学
·
电化学
✓ 已验证
产品关联
DOI
高影响因子
KEY ENGINEERING MATERIALS
·
2023
·
IF 0
Yu Hong Ma
The employment of lithium (Li) metal is crucial to sustainable Li metal batteries (LMBs) with realistically high energy density. The management and usage of Li in reality, however, remain high challenge due to the desirable of obtaining an undamaged Li structure arising from the indispensable in extenuating strongly environmental dependence of Li during stored procedure and minimizing the Li depletion and pulverization on long-term cycles. Herein, we impair the molecular hydrogen bonding cooperation between lithium and water molecules on the surface of Li to demonstrate an achievement of environmental independent and durable Li via integrating a reinforced molecular hydrophobic interface on the surface of Li. As a result, the molecular hydrophobic interface modified Li metal can exhibit dendrite-free Li deposition and achieve stable operation for 200 cycles in Li-S full cell at a current of 1 C.
研究领域:
材料科学
·
电化学
·
能源存储
✓ 已验证
DOI
Small
·
2024
·Vol. 20
·期 34
·2312059
·
IF 13
Lu Wei,Hongyuan Wu,Songtao Liu,Yuyu Zhou,Xin Guo
Realizing high-performance thick electrodes is considered as a practical strategy to promote the energy density of lithium-ion batteries. However, establishing effective transport pathways for both lithium-ions and electrons in a thick electrode is very challenging. This study develops a hierarchical conductive network structure for constructing high-performance NMC811 (LiNi 0.8 Mn 0.1 Co 0.1 O 2 ) cathode toward stable cycling at high areal mass loadings. The hierarchical conductive networks are composed of a Li + /e − mixed conducting interface (lithium polyacrylate/hydroxyl-functionalized multiwalled carbon nanotubes) on NMC811 particles, and a segregated network of single-walled carbon nanotubes in the electrode, without any additional binders or carbon black. Such strategy endows the NMC811 cathode (up to 250 µm and 50 mg cm −2 ) with low porosity/tortuosity, ultrahigh Li + /e - conductivities and excellent mechanical property at low carbon nanotube content (1.8 wt%). It significantly improves the electrochemical reaction homogeneity along the electrode depth, meanwhile effectively inhibits the side reactions at the electrode/electrolyte interface and cracks in the NMC particles during cycling. This work emphasizes the crucial role of the electronic/ionic cooperative transportation in the performance deterioration of thick cathodes, and provide guidance for architecture optimization and performance improvement of thick electrodes toward practical applications, not just for the NMC811 cathode.
研究领域:
材料科学
·
电化学
✓ 已验证
DOI
高影响因子
JOURNAL OF POWER SOURCES
·
2022
·
IF 9.794
Wei Nie,Hongwei Cheng,Xiaolin Liu,Qiangchao Sun,Feng Tian,Wenli Yao,Shuquan Liang,Xionggang Lu,Jiang Zhou
To achieve widespread application of sodium-ion batteries (SIBs) in the future new energy market, developing electrode materials with low-cost sustainability and excellent electrochemical properties is imperative. Herein, a mesoporous N-doping palm leaf-based hard carbon (PLHC-N) anode with a high-rate and long lifespan is synthesized via an in-situ polymerization method by using palm leaf as the carbon precursor and polyaniline as the nitrogen source. Benefiting from the natural holey structure, the PLHC-N exhibits excellent Na + storage capability with numerous ion transfer channels and a good volume buffer . Meanwhile, the N-doping materials improve ion and electron transferability and create more active sites for Na storage. Impressively, the PLHC-N sample shows an adsorption-intercalation-hole filling storage mechanism and affords an ultrahigh reversible capacity of 373 mAh g −1 at 25 mA g −1 , and long-term cycle stability at 200 mA g −1 (∼95.0% retention upon 1000 cycles). Moreover, a full cell with a Na 3 V 2 (PO 4 ) 2 F 3 as cathode shows a favorable cyclability (112 mA h g −1 after 100 cycles at 0.5C (1C = 128 mA g −1 ) and a decent capacity retention of 90.1%). Given the cost effectiveness and material sustainability, our work provides novel strategy to design the hard carbon anode materials for advanced SIBs.
研究领域:
材料科学
·
能源存储
✓ 已验证
DOI
高影响因子
ADVANCED FUNCTIONAL MATERIALS
·
2021
·Vol. 31
·期 37
·2101024
·
IF 18.808
Zhengxin Zhu,Yahan Meng,Yi Cui,Wei Chen
Rechargeable hydrogen gas batteries are highly desirable for large-scale energy storage because of their long life cycle, high round trip efficiency, fast reaction kinetics, and hydrogen gas profusion. Coupling advanced cathode chemistries with hydrogen gas anode is an emerging and exciting area of research. Here, a novel high-performance aqueous iodine-hydrogen gas (I 2 -H 2 ) battery using iodine as cathode and hydrogen gas as the electrocatalytic anode in environmentally benign aqueous electrolytes is reported. The working chemistry of the battery involves I 2 /I − solid-liquid reactions occurring over the cathode along with H 2 /H 2 O gas-liquid reactions at the anode, achieving a high rate performance of 100 C and long-lasting stability of over 60 000 cycles. Additionally, the static aqueous I 2 -H 2 battery displays a volumetric capacity of 15.5 Ah L −1 along with good self-healing capability towards cell overcharge. The current battery design exhibits robust electrochemical performance irrespective of acidic, neutral, and alkaline electrolyte systems. This study paves the way towards the industrialization of economically effective, high-power density, and long-term I 2 -H 2 batteries for large-scale energy storage applications.
研究领域:
能源科学
·
材料科学
·
电化学
✓ 已验证
DOI
高影响因子
ChemSusChem
·
2022
·Vol. 15
·期 24
·e202201739
·
IF 9.14
Kang Zhou,Nan Wang,Xuan Qiu,Haijiao Xie,Peng Wei,Xiaoli Dong,Yonggang Wang
Graphical No water, no problem : The H 2 O activity in aqueous electrolyte is restrained by adding glycerol and acetonitrile into the electrolyte to form hydrogen bonds between organic solvents and H 2 O molecules, which facilities the smooth Zn deposition and alleviates Zn corrosion. Therefore, the Zn//Zn symmetrical cell cycles for over 1300 h and the Zn//FD28 full cell cycles for 9000 cycles. The advantages of low cost and high safety of zinc (Zn) metal have attracted much attention on its application in batteries, but H 2 O-induced issues of hydrogen evolution reaction (HER), Zn corrosion, and Zn dendrites formation limit the application. Here, a strategy of adjusting H 2 O activity was provided by adding glycerol (GL) and acetonitrile (AN) into aqueous electrolyte to form hydrogen bonds between organic solvents and H 2 O, which alleviated the Zn corrosion. Furthermore, molecular dynamics (MD) simulation indicated that GL could exclude H 2 O from the Zn 2+ solvation shell, thus preventing undesired HER and Zn dendrites formation. Therefore, the corresponding Zn//Zn symmetrical cell showed a ultralong lifespan (1300 h). Then, a Zn-organic battery with 3,7-dimorpholino-phenothiazin-5-ium iodide (FD28) cathode was fabricated by using such electrolyte. Interestingly, the reduced H 2 O activity also ensured the stable operation of organic cathode, and thus the full cell showed superior cycle stability for over 9000 cycles (≈1100 h), which is superior to previous reports. Moreover, such electrolyte owns novel properties of nonflammability, great weatherability, and low freezing point, thus boosting the practicality of the battery.
研究领域:
材料科学
·
电化学
✓ 已验证
DOI
PubMed
高影响因子
CHEMICAL ENGINEERING JOURNAL
·
2024
·
IF 13.3
Bin He,Liangming Feng,Guang Hong,Liuchao Yang,Qian Zhao,Xiangjun Yang,Siyi Yin,Yan Meng,Dan Xiao,Yujue Wang,Jie Ai
N/F-doped nanospheres hard carbon (CDC-F-900) was prepared via simple annealing followed by HF solvothermal reaction. F-doping is achieved by replacing –OH and –COOH groups with F − to form C-F and C-F 2 . Abundant micropores and defect structures exist in CDC-F-900, providing a rapid diffusion pathway for Na + /K + . Therefore, it provides the capacity of 372.2 mAh/g after 1000 cycles at 0.1 A/g in sodium-ion batteries (SIBs). Especially in potassium-ion batteries (PIBs), it can still provide an ultra-high capacity of 214.2 mAh/g at 10 A/g after 5000 cycles. This is due to the inorganics-rich SEI which possesses higher ionic conductivity and stability, resulting in excellent long-cycle stability. Density functional theory (DFT) calculations indicate that the conjugate effect of N/F leads to an appropriate adsorption energy for K + at defects. Not only does it increase the reversible capacity by reducing irreversible K + adsorption, but it also accelerates ion transport rate, resulting in better rate capability. The potassium storage mechanism of CDC-F-900 is elaborated in detail through in-situ Raman spectroscopy and XRD pattern. This work provides a new insight for the design and development of low-cost, source-rich, and long-life hard carbon anodes for SIBs/PIBs.
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
·
2016
·
IF 3.014
Tongbin Lan,Tao Wang,Weifeng Zhang,Nae-Lih Wu,Mingdeng Wei
A facile, low-temperature hydrothermal synthetic route was designed for fabricating rutile TiO 2 mesocrystals composed of ultra-tiny, rod-like subunits. Mesocrystals with tunable sizes and morphologies of the subunits can be simultaneously achieved through a hydrothermal re-treatment process at different temperatures. A probable mechanism for the formation of the self-assembled giant rutile TiO 2 mesocrystals of various sizes and morphologies is proposed based on the experimental results. The rutile TiO 2 giant mesocrystals as-fabricated were also tested as anode materials for sodium-ion storage, and exhibited a capacity of 129.6 mA h g −1 with a capacity retention of 97% for over 1000 cycles at a charge–discharge rate as high as 5 C and enhanced rate capability up to 30 C (64.5 mA h g −1 at 30 C), effectually demonstrating superior sodium storage properties in terms of long-term cycling stability and rate capability.
研究领域:
材料科学
·
电化学
✓ 已验证
产品关联
DOI
高影响因子
ACS Nano
·
2017
·
IF 13.942
Guodong Zou,Qingrui Zhang,Carlos Fernandez,Gang Huang,Jianyu Huang,Qiuming Peng
Rational design of heterogeneous electrode materials with hierarchical architecture is a potential approach to significantly improve their energy densities. Herein, we report a tailored microwave-assisted synthetic strategy to create heterogeneous hierarchical Ti3SiC2@C-containing Na2Ti7O15 (MAX@C-NTO) composites as potential anode materials for high-performance sodium storage in a wide temperature range from 25 to 80 °C. This composite delivers first reversible capacities of 230 mAh g–1 at 200 mA g–1 and 149 mAh g–1 at 3000 mA g–1 at 25 °C. A high capacity of ∼93 mAh g–1 without any apparent decay even after more than 10 000 cycles is obtained at an ultrahigh current density of 10 000 mA g–1. Moreover, both a high reversible capacity and an ultralong durable stability are achieved below 60 °C for the same composites, wherein a 75.2% capacity retention (∼120 mAh g–1 at 10 000 mA g–1) is achieved after 3000 cycles at 60 °C. To the best of our knowledge, both the sodium storage performances and the temperature tolerances outperform those of all the Ti-based sodium storage materials reported so far. The superior sodium storage performances of the as-synthesized composites are attributed to the heterogeneous core–shell architecture, which not only provides fast kinetics by high pseudocapacitance but also prolongs cycling life by preventing particle agglomeration and facilitates the transportation of electrons and sodium ions by large micro/mesopore structure.
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
Advanced Powder Materials
·
2021
·
IF 0
Mengqin Gao,Wan-Ying Zhou,Yu-Xue Mo,Tian Sheng,Yanhong Deng,Liezun Chen,Kai Wang,Yanliang Tan,Haiqing Zhou
Here we proposed a novel approach to greatly enhance the electrochemical performance of Li–S batteries by designing a composite electrode material composed of a core-shell structure of S@Pt composite (sulfur content, 85%) grown on the S surface. The platinum (Pt) nanosheets provide physical barrier and strong chemical binding to anchor LiPSs and improve the electronic conductivity of S. Significantly, by introducing carbon nanofibers (CNFs) as the interlayer, we achieved outstanding Li–S battery with a high initial discharge capacity of 1040 mAh g −1 at 1.0 C and a reversible capacity of 742 mAh g −1 after 350 cycles, demonstrating its excellent long-term cycling stability with a low capacity decay rate of 0.08% per cycle. According to the density functional theory (DFT) calculations, we proposed that the superior performance is attributed to the cooperative effects of the strong interfacial interaction between Pt (111) surface and the S 8 molecule, and very low reaction energy of decomposition, −6.4 eV.
研究领域:
材料科学
·
电化学
✓ 已验证
DOI
ACS Applied Materials & Interfaces
·
2024
·
IF 8.3
Xiaojing Zhang,Jing Xie,Yakun Tang,Zhenjiang Lu,Jindou Hu,Yang Wang,Yali Cao
High theoretical capacity of Bi2S3 propels it toward an ideal anode material for lithium-ion batteries (LIBs); however, rapid capacity attenuation and poor long-term stability are major barriers to widespread application. In this work, an oxygen self-doping strategy was utilized to synthesize O–Bi2S3@C, significantly increasing the amount of active sites for lithium-ion storage. Meanwhile, sulfur vacancies were formed to improve the electrical conductivity and ionic transport efficiency, enhance the long-term stability, and accelerate the electrochemical kinetics of Bi2S3@C. O-BSC-S1:3 anode exhibits a reversible capacity of 673.1 mAh g–1 at 0.2 A g–1. It retains a long-term capacity of 596.3 mAh g–1 over 1100 cycles at a high density of 3 A g–1 in LIBs. Moreover, the installed O–Bi2S3@C//LiCoO2 full battery offers exceptional reversible capacity and remarkable cyclability (325.2 mAh g–1 after 200 cycles) at 0.2 A g–1. The combined strategy of oxygen self-doping and sulfur vacancy effectively enhances the reversible capacity and cycling life of Bi2S3, providing an approach for the design of high-performance transition metal sulfide anodes for LIBs.
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
Energy & Environmental Science
·
2024
·
IF 32.4
Huangwei Zhang,Yidan Zhang,Chen Cao,Wanli Zhao,Kai Huang,Yi Zhang,Yue Shen,Zhen Li,Yunhui Huang
The lithium–sulfur (Li–S) battery is a highly promising candidate for next-generation battery systems. However, the shuttle effect of polysulfides or the dendrites and side reactions of lithium metal anodes limit the cycle life of batteries. In particular, at the pouch cell level, achieving long-term cycling stability is extremely challenging. Here, we have constructed a Li–S pouch cell with sulfurized pyrolyzed poly(acrylonitrile) (SPAN) as the cathode and graphite (Gr) as the anode, introducing lithium-ions through a facile in situ pre-lithiation method. In carbonate-based electrolytes, the SPAN cathode can avoid the shuttle effect, while the Gr anode can exclude the interference of lithium metal. By rationally controlling the cycling conditions to suppress the loss of active lithium and the increase in resistance, a SPAN‖Gr pouch cell with 1000 cycles and 99% capacity retention rate can be ultimately obtained. The A h-level pouch cell can stably cycle for 1031 times with 82% capacity retention rate and pass multiple safety tests. This design is expected to fundamentally improve the long-term cycling stability of Li–S pouch cells and it has great potential in the field of large scale energy storage due to its absence of transition metal elements.
研究领域:
能源存储
·
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）