APPLIED SURFACE SCIENCE
·
2025
·
IF 6.9
Suxing Xue,Huan Zhang,Huan He,Yachao Jin,Li Song,Mingdao Zhang
Due to the exceptional specific capacity, high energy density, and low cost, Li-rich manganese-based cathode materials (LRMCs) have emerged as promising candidates for next-generation lithium-ion batteries. However, their practical applications are hindered by relatively low initial Coulombic efficiency (ICE), continuous voltage fading during cycling, and poor capacity retention. In this study, Polyvinylpyrrolidone (PVP) and melamine are employed to treat the material surface, generating oxygen vacancies and forming a protective nitrogen-doped carbon layer. The presence of oxygen vacancies not only enhances Li + diffusion kinetics but also plays a critical role in suppressing voltage decay by activating stable cationic redox and minimizing irreversible oxygen release, which is key to the enhanced ICE. Additionally, the N-doped carbon coating establishes efficient electron conduction networks, facilitating efficient charge transfer. The modified materials exhibit an initial discharge capacity of 301.65 mAh g −1 at 0.1C (vs. 268.13 mAh g −1 for the pure Li 1.2 Mn 0.54 Ni 0.13 Co 0.13 O 2 (LMNCO)), with an ICE of 87.88 % (pristine 77.46 %). After 200 cycles, the capacity retention reaches 85.17 % (compared to 45.16 % for the pure materials), and the voltage decay decreases from 0.72 V to 0.51 V. This study provides an important exploration for overcoming the challenges in the development of high-performance Li-rich manganese-based cathode materials.
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产品关联
DOI
高影响因子
Advanced Optical Materials
·
2021
·Vol. 9
·期 19
·2100337
·
IF 9.926
Dan Zhang,Xiangting Zhang,Baofeng Zheng,Qi Sun,Zhibo Zheng,Zhan Shi,Yanhua Song,Haifeng Zou
A series of Eu 2+ single doped Ca 9 Na 1– x Li x Sc 0.667 (PO 4 ) 7 phosphors with full-spectrum emission have been synthesized. Under the 385 nm excitation, the Eu 2+ single doped Ca 9 NaSc 0.667 (PO 4 ) 7 without Li + doping displays a broad cold white light emission with the peaks at about 480 and 610 nm. With the introduction of Li + ions, the Eu 2+ ions selectively occupy the Ca1, Ca2/Ca3, and Na sites. The variation of local environment of Eu 2+ ions caused by Li + ions enhances the luminous intensity, solves the problem of the lack of a red light component, and realizes the emission color tuning from cold white via warm white to orange. A special charge compensation method caused by Li + migration avoids the generation of defects and is beneficial to the improvement of luminescence properties. Eventually, a warm white light-emitting diode device is prepared by combining the white emitting Ca 9 Na 0.8 Li 0.2 Sc 0.667 (PO 4 ) 7 :2%Eu 2+ phosphors with 385 nm LED chip, which exhibits a high color-rendering of 92.9, low correlated color temperatures of 4529 K, and excellent color stability under working temperature. The as-reported warm white emitting Eu 2+ -doped phosphors have potential applications in full-spectrum solid-state lighting. The site engineering strategy provides an extensive guide for optimizing and designing novel single-composition white-emitting phosphor materials.
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DOI
高影响因子
Nano Energy
·
2018
·
IF 13.12
Guorong Chen,Juan An,Yiming Meng,Changzhou Yuan,Bryan Matthews,Fei Dou,Liyi Shi,Yongfeng Zhou,Pingan Song,Gang Wu,Dengsong Zhang
Cobalt-free Li and Mn-rich layered cathode materials are promising for next generation lithium ion batteries due to their high specific capacity and low cost. However, these materials are facing serious issues, such as structural collapse due to volume shrinkage during Ni 2+ oxidation to Ni 4+ and oxygen vacancy generation over 4.5V. In this work, we report a strategy to address the issue of volume shrinkage caused by structural deformation via constructing a large-size rigid frame by simultaneously doping inactive and large radius atoms of Cd and S. This strategy significantly reduces the volume shrinkage when fully delithiated relative to the pristine material. The Cd- and S-doped cathode materials present a highly reversible structure, which were determined by using HAADF-STEM and in-situ XRD characterization. The doped Cd and S atoms act as supporting atoms and synergistically enlarge the layer spacing of crystalline from 0.455 to 0.483 nm. The in-situ XRD monitors the structural changes in real time during charging and discharging processes, further verifying structural stability during cycling. Due to the unique structural properites, an initial capacity of 268.5 mAh g −1 at 0.1 C along with a good rate capacity of 153.8 mAh g −1 at 5 C were achieved. Also, a capacity of 243.4 mAh g-1 at 0.1 C over 80 cycles indicate good cyclic stability of the co-doped Li- and Mn-rich layered cathode.
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DOI
高影响因子
ACS Applied Energy Materials
·
2023
·
IF 6.4
Heng Li,Zhi Li,Jiali Liu,Shuang Cao,Jiarui Chen,Hui Hu,Changmeng Guo,Xiaoyan Zhang,Xianyou Wang
With the advantages of low cost and high energy density, Co-free Li-rich layered oxides (LROs) are a potential next-generation lithium-ion battery cathode material for energy vehicles. However, LROs suffer from the defects of irreversible O-redox and low conductivity, producing poor cycling stability and rate performance and low initial Coulombic efficiency (ICE). In this work, the ammonium niobium oxalate (C4H4NNbO9·nH2O) treatment strategy is proposed to realize oxygen vacancy construction and Nb5+ doping on the surface of the LRO material. The results show that the optimized sample LRO-Nb-0.5 presents satisfactory electrochemical performance; for example, at 1C, the specific discharge capacity is 209.77 mAh g–1 and a capacity retention rate is 93.22% after 300 cycles. In addition, the high-rate capability is distinctly enhanced; a specific discharge capacity of 178.70 mAh g–1 can be achieved at 5C for LRO-Nb-0.5. Therefore, Nb5+ doping and oxygen vacancy regulation can be significant explorations for the promotion of the electrochemical performance of Co-free Li-rich materials.
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DOI
高影响因子
Journal of Materials Chemistry A
·
2021
·Vol. 9
·期 31
·17039-17047
·
IF 12.732
Fuxin Wei,Shufen Wu,Jiliang Zhang,Hongyang Fan,Liuyang Wang,Vincent Wing-hei Lau,Sizhou Hou,Minmin Zhang,Jiafeng Zhang,Bo Liang,Ruirui Zhao
Developing all solid-state lithium ion batteries (ASSBs) is a promising way to solve safety issues surrounding liquid-based batteries, yet the interfacial issues make ASSBs insufficient in providing long-term cycling performance or acceptable rate capabilities. Herein, we propose a new kind of electrolyte configuration, comprising a 3D ceramic framework filled with plastic crystals on the surface, to effectively enhance the interfacial Li diffusion kinetics. The soft plastic crystals enable not only excellent contact with the rigid framework and cathodes, but also rapid molecular reorganization to accommodate the interfacial Li, achieving ultrafast Li diffusion globally via the 3D framework. As a result, the ASSBs with the proposed electrolyte (i.e. garnet-succinonitrile composites) show an extremely low interfacial resistance, providing an initial discharge capacity of 165.3 mA h g−1 and a 95% capacity retention after 100 cycles when using a LiNi0.5Co0.2Mn0.3O2 (NCM) cathode. Furthermore, these NCM-ASSBs using the designed electrolyte even exhibit better cycling performance within a higher voltage range (2.8–4.5 V) than conventional lithium ion batteries (LIBs) using conventional liquid electrolytes (LEs). A capacity retention rate of 92% for 3DLLZO-PCE is demonstrated, against the 85% for LE-LIBs after 50 cycles. We believe that this strategy provides useful guidance for constructing high-performance ASSBs, which is important in their further commercialization.
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DOI
高影响因子
Journal of Materials Chemistry A
·
2020
·Vol. 8
·期 39
·20666-20676
·
IF 11.301
Die Su,Li Liu,Zhixiao Liu,Jing Dai,Jiaxing Wen,Min Yang,Sidra Jamil,Huiqiu Deng,Guozhong Cao,Xianyou Wang
Ta-doped TiO2/C nanofibers are synthesized by an electrospinning method. First-principles calculations reveal that the Ta dopant can lower the Li/K diffusion barrier, which is beneficial for improving the rate capability. According to the electronic structure analysis, the dopant can obviously shift the conduction band of TiO2 downward, resulting in significantly improved electronic conductivity. Ta doping causes phase transformation from anatase to rutile, and increases the specific surface area. The well-designed rutile Ta-doped TiO2/C nanofibers show outstanding electrochemical properties in both Li-metal half cells and K-metal half cells, which are much better than those of pristine anatase TiO2/C nanofibers. At 2 A g−1, 5% rutile Ta-doped TiO2/C nanofibers could deliver high reversible specific capacities of 399 mA h g−1 in Li-ion batteries after 1000 cycles whereas deliver 148 mA h g−1 in K-ion batteries after 800 cycles. When assembled, the full cells with 5% rutile Ta-doped TiO2/C nanofibers as the anode and commercial LiFePO4/perylene-3,4,9,10-tetracarboxylic dianhydride as the cathode show excellent cycling performance and can light up more than 18 LEDs. These results demonstrate that Ta-doped TiO2/C nanofibers are a promising anode material for Li/K ion batteries.
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DOI
高影响因子
JOURNAL OF MATERIALS SCIENCE-MATERIALS IN ELECTRONICS
·
2021
·Vol. 32
·期 14
·19901-19911
·
IF 2.478
Wang Fei,Liu Xiaoyu,Liu Zhuang,Wang Yanming
The large-scale application of Li-ion batteries requires high-performance cathode materials. Herein, a high-activity Li 3 V 2 (PO 4 ) 3 /C composite cathode has been fabricated through a solid-state reaction employing dual carbon sources of poly(acrylic acid) and soluble starch. The effects of single carbon source and dual carbon sources on the physical and electrochemical properties of Li 3 V 2 (PO 4 ) 3 /C are analyzed. The porous structure induced by poly(acrylic acid) and highly conductive carbon resulted from soluble starch enable the composite to achieve large discharge capacities and stable cyclability at high C-rates. At 3.0–4.3 V and 10 C, a large discharge capacity of 121 mAh g −1 (nearly 91% of the theoretical capacity) can be obtained, along with high capacity retention of 88% over 1000 cycles. Furthermore, at 3.0–4.8 V, the composite also possesses larger high-rate capacities and better cyclability than other composites prepared using single carbon source. The dual carbon sources bring a synergistic effect to the enhancement of electrochemical performances of the Li 3 V 2 (PO 4 ) 3 /C composite.
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DOI
高影响因子
Nanoscale
·
2021
·Vol. 14
·期 3
·700-714
·
IF 7.79
Zhiyu Zhou,Zexiang Chen,Yang Zhao,Huifang Lv,Hualiang Wei,Bingbing Chen,Zengjie Gu,Yan Wang
In recent years and following the progress made in lithium-ion battery technology, substantial efforts have been devoted to developing practical lithium–sulfur (Li–S) batteries for next-generation commercial energy storage devices. The practical application of Li–S batteries is still limited by dramatically reduced capacities, cycling instabilities, and safety issues arising from flammable components. In this study, we designed and fabricated a flame-retardant, multifunctional interlayer which integrated electroconductive networks, lithium polysulfide (LiPS) traps and catalysts to significantly elevate the electrochemical performance and safety of pristine Li–S batteries. The LiPS adsorptive polymer polyimide (PI) constrains polysulfides to the cathode region and effectively suppresses the shuttle effect. Coralloid PI/multiwalled carbon nanotube (MCNT) compounds provide plentiful reaction sites for active materials. The catalytic Ni on the metal skeleton surface notably promotes Li+ diffusion, lowers the redox overpotential and accelerates LiPS conversion, which improves the redox kinetics associated with sulfur-related species and significantly elevates sulfur utilization. At different current densities of 0.2 C and 0.5 C, impressive initial discharge capacities of 1275.3 mA h g−1 and 1190.9 mA h g−1 are attainable respectively, with high capacity retentions of 80.3% and 78.6% over 600 cycles. Besides, the multifunctional interlayer can also act as a flame-retardant layer to promote the safety of Li–S batteries by inhibiting the spread of fire. This study provides a feasible and prospective strategy that adopts a multifunctional interlayer to develop Li–S batteries with higher capacities, longer cycling lives and safer working conditions.
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DOI
高影响因子
Materials Today Energy
·
2020
·
IF 5.604
Z.H. Xie,Z.X. Huang,M.Z. Rong,M.Q. Zhang
To retard the performance degradation of sulfur cathode in lithium–sulfur (Li–S) batteries originating from severe volume variation and intermediate polysulfides shuttle effect during charge and discharge process, commercial polyacrylic acid (PAA) crosslinked by cationic hydroxypropyl polyrotaxane (HPRN + ) is used as a water-based multifunctional binder (PAA-HPRN + ) of the cathode for the first time. The assembled Li–S battery with the simple sulfur/carbon composite cathode adhered by PAA-HPRN + displays an outstanding cycling specific capacity retention of 59.9% after 900 cycles at 1.0 C, and the corresponding capacity fading rate per cycle is 0.0446%, which are better than many reported values. Moreover, the cathode also exhibits excellent specific capacity and cycling stability even under high sulfur loading. The superior electrochemical properties are attributed to the slipping of the polyrotaxane that provides the binder with improved mechanical robustness and trapping capability of the soluble polysulfides that suppresses shuttle effect. The proposed design of the multifunctional binder may help to realize practical application of the Li–S battery.
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DOI
高影响因子
ACS Applied Materials & Interfaces
·
2021
·
IF 9.229
Feng Shao,Hong Li,Lu Yao,Shiwei Xu,Gang Li,Bin Li,Cheng Zou,Zhi Yang,Yanjie Su,Nantao Hu,Yafei Zhang
High-capacity silicon (Si) is recognized as a potential anode material for high-performance lithium-ion batteries (LIBs). Unfortunately, large volume expansion during discharge/charge processes hinders its areal capacity. In this work, we design a flexible graphene-fiber-fabric (GFF)-based three-dimensional conductive network to form a binder-free and self-standing Si anode for high-performance LIBs. The Si particles are strongly wrapped in graphene fibers. The substantial void spaces caused by the wrinkled graphene in fibers enable effective accommodation of the volume change of Si during lithiation/delithiation processes. The GFF/Si-37.5% electrode exhibits an excellent cyclability with a specific capacity of 920 mA h g–1 at a current density of 0.4 mA cm–2 after 100 cycles. Furthermore, the GFF/Si-29.1% electrode exhibits an excellent reversible capacity of 580 mA h g–1 at a current density of 0.4 mA cm–2 after 400 cycles. The capacity retention of the GFF/Si-29.1% electrode is up to 96.5%. More importantly, the GFF/Si-37.5% electrode with a mass loading of 13.75 mg cm–2 achieves a high areal capacity of 14.3 mA h cm–2, which outperforms the reported self-standing Si anode. This work provides opportunities for realizing a binder-free, flexible, and self-standing Si anode for high-energy LIBs.
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DOI
高影响因子
ACS Nano
·
2024
·
IF 15.8
Yuqing Dai,Jiaxu Tan,Zihan Hou,Bianzheng You,Gui Luo,Duo Deng,Wenjie Peng,Zhixing Wang,Huajun Guo,Xinhai Li,Guochun Yan,Hui Duan,Ying Wang,Feixiang Wu,Jiexi Wang
The matching of poly(ethylene oxide) (PEO)-based electrolytes with ultrahigh-nickel cathode materials is crucial for designing new-generation high-energy-density solid-state lithium metal batteries (SLMBs), but it is limited by serious interfacial side reactions between PEO and ultrahigh-nickel materials. Here, a high-concentration electrolyte (HCE) interface with a customized Li+ solvation sheath is constructed between the cathode and the electrolyte. It induces the formation of an anion-regulated robust cathode/electrolyte interface (CEI), reduces the unstable free-state solvent, and finally achieves the compatibility of PEO-based electrolytes with ultrahigh-nickel cathode materials. Meanwhile, the corrosion of the Al current collector caused by lithium bis(trifluoromethanesulfonyl)imide (LiTFSI) ions is prevented by lithium difluoro(oxalato)borate (LiDFOB) ions. The synergistic effect of the double lithium salt is achieved by a well-tailored ratio of TFSI– and DFOB– in the first solvation sheath of Li+. Compared with reported PEO-based SLMBs matched with ultrahigh-nickel (Ni ≥ 90%) cathodes, the SLMB in this work delivers a high discharge specific capacity of 216.4 mAh g–1 (0.1C) even at room temperature. This work points out a direction to optimize the cathode/electrolyte interface.
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DOI
高影响因子
INTERNATIONAL JOURNAL OF ENERGY RESEARCH
·
2022
·Vol. 46
·期 14
·19357-19367
·
IF 4.672
Jiuqing Liu,Feifei Song,Junying He,Zikun Hong,Qihou Li,Ya Chen,Lishun Bai,Fanli Zeng,Chen Cheng,Zehao Chen
Summary Owing to its unparalleled theoretical energy density, the Li-O 2 batteries are thought to be one of the most promising energy storage systems, but its application is seriously hindered by its potential safety risks arising from the passivation and corrosion of lithium anode. To address these issues, it is an efficient way to develop functionalized separator that could prevent the migration of anions and macromolecules from cathode toward anode. Herein, a novel Nafion-functionalized polyethersulfone (PES)-based ion-permselective separator was prepared by using non-solvent induced phase separation (NIPS) method. The Nafion ensures a better physical strength of the composite separator, and further characterizations show that the obtained composite separator owns good ionic conductivity (0.52 mS cm −1 ), high lithium ion migration number (0.80), and better cyclic stability (120 cycles, 1000 mAh g −1 ). Consequently, the composite separator serves as an excellent candidate to solve the “shuttle effect” of redox mediators (RMs), the assembled Li-O 2 battery with composite separator adding LiI as RMs presents lower charge overpotential and longer cycle stability (170 cycles, 1000 mAh g −1 ).
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DOI
高影响因子
危险品化学品经营许可证（带存储）