CHEMICAL ENGINEERING JOURNAL
·
2020
·
IF 10.652
Jiage Yu,Kun Wang,Wenlong Song,Hui Huang,Chu Liang,Yang Xia,Jun Zhang,Yongping Gan,Feng Wang,Wenkui Zhang
Nano-silicon is a star anode material for the next generation Li-ion batteries with the merits of high theoretical capacity and low voltage plateau. To date, it remains a great challenge to efficiently convert low-cost silica (SiO 2 ) into nano-Si at a low temperature due to the solid Si-O band (the bond energy is 460 kJ mol −1 ). Herein, a low temperature MgH 2 -AlCl 3 -SiO 2 melt system is developed to synthesize nano-Si through the reduction of SiO 2 by MgH 2 in the molten AlCl 3 . It is confirmed to be a controllable liquid-solid process with no side reactions and high Si yield of 97.6%. The battery grade nano-Si product can be obtained by suitable post-treatment without undesirable HF etching. This reaction can be initiated at as low as 150 °C, which is much lower than mostly reported synthesis routes of nano-Si. The nano-Si product with an average particle size of 22.4 nm exhibits superior electrochemical storage capacity of 1185 mA h g −1 over 300 cycles at 0.2 A g −1 and a low increased thickness of 14.5% at 2 A g −1 over 500 cycles. We believe that this low temperature melt system not only paves the new path of synthesizing nano-Si, but also gives a new insight into the effects of nanoscale particle size on the electrochemical performance of Si anode.
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高影响因子
CHEMICAL ENGINEERING JOURNAL
·
2021
·
IF 13.273
Huiqiao Liu,Yanan He,Kangzhe Cao,Yong Jiang,Xiaogang Liu,Qiang-Shan Jing,Lifang Jiao
Al has been considered as a promising Li-ion batteries anode. However, the volume expansion always makes the electrode in an unstable structure. Meanwhile, the natural Al 2 O 3 passivation layer may lead to a large voltage dip, which could interrupt the lithiation process and result in a limited capacity. Herein, we report a neat avenue to activate the commercial Al pellet electrode by replacing the Al 2 O 3 layer with Sn at room temperature. Not any acid or tedious process is needed. Benefiting from the elimination of Al 2 O 3 and high electrochemical-activity of Sn, the obtained Al@Sn pellet electrode delivers a reversible capacity of 959.5 mAh g −1 at 0.1 A g −1 , which is larger than that (395.7 mAh g −1 ) of the commercial Al pellet electrode and approaches the calculated theoretical capacity. Notably, the voltage dip is muchly lowered to 0.03 V from 0.1 V. When graphene oxide (GO) was further attached for relieving the volume expansion, the as-prepared Al@Sn@GO pellet electrode presents astonishing Li-ion storage properties both in half and full batteries. This work demonstrates that the cooperation of the Al 2 O 3 elimination and matrix addition is successful in promoting the Li-ion storage properties of Al anode, presenting an attractive vision for the development of practical Al-based anodes.
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高影响因子
JOURNAL OF ALLOYS AND COMPOUNDS
·
2021
·
IF 5.316
Shuyue Yang,Zhen Xu,Jie Xu,Junlin Lu,Dongmei Zhang,Shibing Ni
Nitrogen doped carbon bridged Li 3 VO 4 -Ga 2 O 3 hybrid (Li 3 VO 4 -Ga 2 O 3 /NC) is first synthesized through an intermediate solution method with subsequent annealing. The Li 3 VO 4 -Ga 2 O 3 /NC hybrid exhibits robust pseudocapacitive charge storage owing to the synergetic effect between each component, resulting in ultra-high capacity and ultra-stable cyclability as anode for Li-ion batteries. At a specific current of 0.1 A g −1 , the Li 3 VO 4 -Ga 2 O 3 /NC electrode delivers high reversible capacity of 652.6 mA h g −1 after 400 cycles, without obvious capacity attenuation over cycling. After three periodic rate performance testing from 0.1 to 2.0 A g −1 over 260 cycles, the Li 3 VO 4 -Ga 2 O 3 /NC electrode delivers high discharge capacity of 750.3 mA h g −1 when reverting current to 0.1 A g −1 . The Li 3 VO 4 -Ga 2 O 3 /NC electrode also shows excellent long cycle stability at 1.0 A g −1 , delivering high discharge capacity of 450.4 mA h g −1 after 1600 cycles.
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高影响因子
JOURNAL OF ALLOYS AND COMPOUNDS
·
2023
·
IF 6.2
Weibin Guo,Yunfan Wu,Shihao Wang,Yuanyuan Liu,Guiyang Gao,Liang Lin,Mengjian Fan,Xutao Zhu,Li Xia,Qing Luo,Laisen Wang,Ji Shi,Jie Lin,Qingshui Xie,Dong-Liang Peng
The instability of the anionic redox reaction and the resulting irreversible oxygen release are the core causes of the deterioration of the cycling stability of Li-rich cathode materials (LRM). The effective method is to establish a surface coating on the LRM, which is equivalent to converting surface oxygen on the LRM into bulk oxygen. However, developing a coating that can form a solid binding with the surface oxygen of the LRM remains challenging. To solve the above challenge, a uniform surface boron cobalt complexes (BCCs) coating was constructed on cobalt-free LRM. The constructed BCCs coating can significantly mitigate the interface side reaction, Mn dissolution, and irreversible gas release, and enhance structural stability. The cycling stability shows that the modified LRM cathode exhibits superior capacity retention (92.7 %) compared to that of the pristine LRM cathode (78.1 %) after 300 cycles at 1 C. This modification strategy heralds a useful paradigm for optimizing the cycling stability of LRM to promote their commercial application.
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高影响因子
JOURNAL OF POWER SOURCES
·
2025
·
IF 7.9
Wei Shu,Yuan Yuan,Jisong Hu,Shiquan Lü,Yanhui Chen,Yun Zheng,Jinlong Yang,Lei Wang,Wenxing Zhang
Li-rich layered oxides (LLOs) cathodes exhibit high specific capacities (>250 mAh·g −1 ), yet their practical application is hindered by inherent structural instability and low ionic conductivity. This study proposes a trace dual-metal doping strategy (0.2 wt% Zr and 0.1 wt% Al) to enhance the structural stability and Li + transport efficiency of Li 1.2 Ni 0.16 Co 0.16 Mn 0.48 O 2 . Combined in-situ X-ray diffractions and density functional theory calculations reveal that Zr 4+ and Al 3+ doping at 3b sites suppresses lattice expansion along the c -axis (Δ c reduced by 6.9 %) and strengthens the metal-oxygen bond, thereby mitigating Li/Ni cation mixing and oxygen loss during cycling. The optimized [email protected] sample achieves a capacity retention of 80.8 % after 500 cycles at 9.5 mg cm −2 loading, with a total discharge voltage decay of 0.78 V after 500 cycles. Additionally, it delivers a high-rate capacity of 136 mAh·g −1 at 5C. This work provides new insights into synergistically optimizing structural stability while maintaining electrochemical performance through dual-metal doping.
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产品关联
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高影响因子
ACS Applied Energy Materials
·
2025
·
IF 5.5
Hongwei Zhu,Shidi Huang,Zhe Cui,Mengluan Gao,Wenqing Wang,Rujia Zou
Although elevating the upper cutoff voltage can directly increase the reversible capacity of LiCoO2 (LCO), severe capacity fading caused by structural and interfacial degradation restricts its practical application. Herein, we propose a synergetic modification strategy combined with La3+ doping and LiTaO3 (LTO) coating to enhance the electrochemical performance of LCO operating at high voltages. Generally, La3+ doping can increase the interlayer spacing and significantly increases the ion conductivity, while the LTO coating acts as a robust protection layer, which also facilitates the interfacial Li+ diffusion. As a result, comodified LCO shows an enhanced capacity retention of 88.6% after 200 cycles at 3.0–4.5 V, while the capacity retention of Bare LCO is only 25.4%. For a higher cutoff voltage of 4.6 V, comodified LCO still exhibits an excellent capacity retention of 85.7% after 100 cycles.
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高影响因子
Carbon Letters
·
2025
·
IF 5.8
Lee Kang Mi,Lee Jong Dae
In this study, an anode composite material was fabricated by embedding spherical carbon-coated nanosilicon (Si@C) into a layered carbon-coated silicon (L-Si/C) to enhance the capacity and stability of silicon-based lithium-ion batteries. The L-Si/C material was obtained by reacting CaSi 2 through a CO₂-assisted carbonization process, followed by removal of the CaCO 3 byproduct via HCl etching. Si@C particles, prepared using polydopamine as a carbon precursor, were uniformly embedded in the L-Si/C via ultrasonic treatment. The physical properties of the prepared anode composites were analyzed using HR-SEM, EDS, XRD, and BET. The electrochemical performances were investigated using 1 M LiPF 6 in EC:DEC (1:1 vol%) with 10 wt% FEC as the electrolyte, through charge–discharge cycling, rate capability tests, electrochemical impedance spectroscopy (EIS), and differential capacity (dQ/dV) analysis. L-Si/C exhibited the best electrochemical performance under the thermal treatment condition of 720 °C and a CO 2 flow rate of 100 sccm. In addition, the application of ultrasonic treatment improved structural stability and rate capability. Consequently, the S_L-Si/C + Si@C-2 exhibited a high initial discharge capacity of 2700.7 mAh/g at 0.1 C and a capacity of 617.4 mAh/g at a high rate of 6 C.
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高影响因子
CHEMISTRY OF MATERIALS
·
2025
·
IF 7
Jiale Han,Guofan Wang,Xu Hu,Jinlin Li,Zhaojun Xie,Zhen Zhou
Rechargeable lithium oxygen (Li–O2) batteries are regarded as promising candidates for future energy storage systems due to their exceptionally high theoretical energy density. However, their practical implementation faces major obstacles, including high charge and discharge overpotentials and a semiopen battery structure that is highly sensitive to humidity. These factors lead to reduced efficiency and poor stability in moist air, significantly limiting real-world application. To address these challenges, a composite photoelectrode was developed by directly growing tungsten trioxide (WO3) nanoribbons on carbon paper (CP), followed by the uniform deposition of platinum nanoparticles using atomic layer deposition. Compared to WO3 photoelectrode, the resulting Pt–WO3 photoelectrode enables stable operation of photoassisted Li–O2 batteries under humid oxygen atmosphere. The batteries sustain stable operation for over 100 cycles without failure at current densities of 0.05 and 0.2 mA cm–2. Advanced characterization and theoretical calculations confirm the formation of an ohmic contact between platinum and tungsten trioxide, which promotes the separation of photogenerated electrons and holes, improves charge transfer, and facilitates the reversible formation and decomposition of lithium hydroxide (LiOH). This strategy effectively overcomes critical barriers faced by conventional Li–O2 batteries in real-world environments and provides a promising direction for the design of environmentally tolerant and photoelectrochemically efficient energy storage systems.
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高影响因子
ACS Applied Materials & Interfaces
·
2023
·
IF 9.5
Yue Lei,Xin Xu,Junying Yin,Sen Jiang,Kang Xi,Lai Wei,Yunfang Gao
Li-metal batteries (LMBs), especially in combination with high-energy-density Ni-rich materials, exhibit great potential for next-generation rechargeable Li batteries. Nevertheless, poor cathode–/anode–electrolyte interfaces (CEI/SEI) and hydrofluoric acid (HF) attack pose a threat to the electrochemical and safety performances of LMBs due to aggressive chemical and electrochemical reactivities of high-Ni materials, metallic Li, and carbonate-based electrolytes with the LiPF6 salt. Herein, the carbonate electrolyte based on LiPF6 is formulated by a multifunctional electrolyte additive pentafluorophenyl trifluoroacetate (PFTF) to adapt the Li/LiNi0.8Co0.1Mn0.1O2 (NCM811) battery. It is theoretically illustrated and experimentally revealed that HF elimination and the LiF-rich CEI/SEI films are successfully achieved via the chemical and electrochemical reactions of the PFTF additive. Significantly, the LiF-rich SEI film with high electrochemical kinetics facilitates Li homogeneous deposition and prevents dendritic Li from forming and growing. Benefiting from the collaborative protection of PFTF on the interfacial modification and HF capture, the capacity ratio of the Li/NCM811 battery is boosted by 22.4%, and the cycling stability of the symmetrical Li cell is expanded over 500 h. This provided strategy is conducive to the achievement of high-performance LMBs with Ni-rich materials by optimizing the electrolyte formula.
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高影响因子
DALTON TRANSACTIONS
·
2021
·Vol. 51
·期 2
·553-561
·
IF 4.39
Dangli Gao,Kaiwei Ma,Peng Wang,Xiangyu Zhang,Qing Pang,Hong Xin,Zihan Zhang,Huan Jiao
Traditional fluorescent materials used in the anti-counterfeiting field usually exhibit monochromatic luminescence at a single-wavelength excitation, which is easily forged by sophisticated counterfeiters. In this work, Zn2GeO4:Mn,x%Li (x = 0 and 20), Zn2GeO4–NaLiGe4O9:Mn,x%Li (x = 50 and 70) and NaLiGe4O9:Mn micro-phosphors with multi-chromatic and multi-mode luminescence have been successfully synthesized via a hydrothermal approach followed by an annealing treatment. As expected these Li+ doped Zn2GeO4:Mn and Zn2GeO4–NaLiGe4O9:Mn phosphors exhibit a double peak emission including a long green afterglow (∼540 nm) and red photoluminescence (∼668 nm). By tuning Li+ doping concentrations, a gradual colour output and a tuneable afterglow duration are achieved. In particular, the Zn2GeO4:Mn,Li and NaLiGe4O9:Mn phosphors exhibit excellent performance as security inks for printing luminescent numbers and anti-counterfeiting patterns, which show an afterglow time-dependent or excitation wavelength-dependent luminescence colour evolution. This work proves the feasibility of the Li+ doping strategy in emission tuning, which can stimulate further studies on multi-mode luminescent materials for anti-counterfeiting applications.
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高影响因子
APPLIED SURFACE SCIENCE
·
2018
·
IF 4.439
Limei Xu,Lin Ma,Xiaoping Zhou,Yan Ling,Xiaolang Wang,Meifeng Chen
A simple hydrothermal plus annealing method has been developed to fabricate SnS/NC nanocomposites and their electrochemcial Li-storage performance has also been investigated. The as-prepared composites are characterized by XRD, SEM, EDS, Raman, BET and XPS. In this composite, ultrathin SnS nanosheets are well hybridized with glucosamine-derived nitrogen-doped carbon to form hierarchical porous architectures with large surface areas. Benefiting from the desirable structural merits as well as the generated synergism between components, the SnS/NC composite electrode delivers an enormously enhanced electrochemical lithium-storage performance including large reversible capacity of 832 mA h g −1 after 100 cycles, enhanced cyclability and superior high-rate capability.
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高影响因子
Journal of Materials Chemistry A
·
2017
·Vol. 5
·期 34
·18138-18147
·
IF 8.867
Kaiqiang Zhou,Meiling Kang,Xiaoqing He,Zhensheng Hong,Zhigao Huang,Mingdeng Wei
Electrode pulverization, low electrochemical reaction kinetics and an unstable SEI layer have prevented the application of transition metal oxides with a conversion-type mechanism. Here, we describe gum arabic (GA) as a green and multi-functional binder for the fabrication of a NiFe2O4 nanotube (NFNT) electrode enabling predominant application in LIBs and NIBs. Firstly, it's revealed that the NFNTs–GA electrode possesses better mechanical properties of a higher friction coefficient, better elastic resilience and higher reduced modulus and hardness compared with a NFNTs–PVDF electrode. Secondly, the NFNTs–GA electrode can restrain the side reactions between the electrode and electrolyte, leading to the formation of a remarkably stable and thin SEI layer during discharge and charge processes. Thirdly, it is demonstrated by KPFM that the NFNTs–GA electrode possesses improved surface electrical properties and lower energy for the escape of electrons. Consequently, the NFNTs–GA electrode demonstrates much improved rate capability, cycling stability and columbic efficiency when used as an anode material for LIBs. It displays a stable capacity of 770 mA h g−1 which can be retained after 500 cycles at 0.5 A g−1. More importantly, the NFNTs–GA electrode exhibits a high initial coulombic efficiency of 73% (only 48% for the NFNTs–PVDF electrode) and enhanced electrochemical reaction kinetics with significantly improved oxidation and reduction peaks in the application of NIBs.
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高影响因子
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