Energy Storage Materials
·
2020
·
IF 16.28
Muhammad Waqas,Yupei Han,Dongjiang Chen,Shamshad Ali,Cheng Zhen,Chao Feng,Botao Yuan,Jiecai Han,Weidong He
With high energy density and low cost, lithium sulfur (Li–S) batteries own the potential to be next-generation electrochemical storage/conversion devices. However, their cyclic stability and life span are considerably impaired by polysulfide shuttling and self-discharge. Here, we design a microfiber glass filter-molybdenum disulfide/carbon-titanium nitride (μFGF-MoS 2 /C–TiN) interlayer for suppressing the shuttle of polysulfides and self-discharge of Li–S batteries. TiN in the interlayer molecularly captures high-order polysulfide Li 2 S 8 with an adsorption energy up to −6.48 eV, the largest high-order polysulfide absorption value ever reported. The μFGF-MoS 2 layer mechanically seizes polysulfides with interconnected torturous mesopores by functioning as a molecular sieve . With a sulfur loading of 4.5 mg cm −2 , the Li–S batteries based on μFGF-MoS 2 /C–TiN exhibit remarkable over-1000-cycle stability with an only 0.05% capacity decay per cycle and deliver an initial discharge capacity of 1000 mAh g −1 at 1C. The self-discharge is alleviated with an insignificant 10.3% capacity loss after a 30-day rest.
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DOI
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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DOI
高影响因子
ELECTROCHIMICA ACTA
·
2019
·
IF 5.383
Yupeng Zhang,Mengqi Zhang,Yangyang Liu,He Zhu,Lei Wang,Yang Liu,Mei Xue,Bo Li,Xutang Tao
TiNb 2 O 7 compound with extra oxygen vacancies is synthesized through unique supercritical fluid process. When fabricated as anode for lithium ion batteries, such TiNb 2 O 7 anode exhibits high initial discharge capacity of 231 mA h g −1 at a current density of 100 mA g −1 , and maintains capacity of 169 mA h g −1 even after 250 cycles in the voltage window of 1.0–3.0 V. The excellent electrochemical performance is mainly attributed to the existence of abundant oxygen vacancies in TiNb 2 O 7 compound, which greatly increases the electronic conductivity and lithium ion diffusion coefficient . Furthermore, the contribution of pseudocapacitive effect to the superior electrochemical performance of as-prepared Ti Nb 2 O 7 is investigated systematically. All in all, it demonstrates that the supercritical fluid is a facile and effective media to create oxygen vacancies in TiNb 2 O 7 , and the TiNb 2 O 7 compound with introduced oxygen vacancies would be a promising candidate for anode materials in high-power lithium ion batteries . This work provides a fresh strategy and route to explore novel multicomponent oxide materials with enhanced electrochemical properties for energy storage.
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DOI
高影响因子
CHEMICAL ENGINEERING JOURNAL
·
2018
·
IF 6.735
Daoyan Feng,Hui Yang,Xingzhong Guo
3-Dimensional hierarchically porous ZnFe 2 O 4 /C composites with interconnected macropores and co-continuous hollow skeletons are facilely synthesized and used as anode materials for Li-ion batteries. The interconnected macropores impede the agglomeration of primary particles and buffer the volumetric variations, hollow mesoporous skeletons not only improve the interfacial contact area between electrode and electrolyte but also facilitate lithium ions transfer rate. Moreover, N-doped carbon layer further enhances the conductivity and mechanical strength of skeletons, as well as accelerates electron transfer during repeated discharge and charge process. The as-prepared 3-dimensional hierarchically porous ZnFe 2 O 4 /C composites possess excellent Li-ion storage properties, delivering a high reversible capacity of 972 mAh g −1 at 200 mA g −1 after 100 cycles and a decent specific capacity of 711 mAh g −1 even at a large current density of 1000 mA g −1 after 400 cycles. These values are among the highest reported for ZnFe 2 O 4 -based materials with different morphologies and nanostructures. The resultant ZnFe 2 O 4 /C composites display the potential practical application for high-performance Li-ion batteries.
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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
ACS Applied Energy Materials
·
2021
·
IF 6.024
Shidong Song,Yongqiang Xu,Yanli Ruan,Hong Wang,Dequan Zhang,Joykumar Thokchom,Donghai Mei
Amorphous Li–La–Zr–O (LLZO) solid-state electrolyte thin films are promising alternatives to the well-established lithium phosphorus oxynitride (LiPON) electrolyte for all-solid-state lithium batteries due to their potentially higher Li-ion conductivity and stability. Herein, the enhancement methodology in the ionic conductivity of amorphous LLZO-based thin films is investigated. By doping with Ta, the conductivity of the amorphous LLZO film at 30 °C (3.9 × 10–7 S cm–1) can be enhanced by up to an order of magnitude (2.6 × 10–6 S cm–1), ascribed to tuning Li conduction in local near-order LLZO nanodomains. On that basis, an isomeric Li–La–Zr–Ta–O (LLZTO) amorphous–crystalline composite thin film is prepared via incorporating cubic LLZTO particles into the amorphous LLZTO matrix. The composite film with 10 wt % cubic LLZTO filler can further achieve an ionic conductivity of 0.8 × 10–5 S cm–1 at 30 °C, which is comparable to the best values obtained for the state-of-art LLZO-based thin films. Li transport through the well-connected cubic LLZTO filler network and along the interfaces between the crystallites and the amorphous matrix in the LLZTO composite thin film may offer fast and long-range Li-conduction pathways, which supplement the ionic conduction in the amorphous matrix with short-range-ordered and long-range-disordered structures.
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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 Materials Chemistry A
·
2016
·Vol. 4
·期 27
·10585-10592
·
IF 8.262
Hang Zhang,Guanhua Zhang,Zhiqin Li,Ke Qu,Lei Wang,Wei Zeng,Qingfeng Zhang,Huigao Duan
Developing advanced anode materials is crucial to further enhance the performance of lithium-ion batteries for electrochemical energy storage. Metal oxides embedded in a carbonaceous matrix are supposed to be promising candidates as anode materials due to their high specific capacity and excellent stability. Herein, we report a CuO/Cu-based carbonaceous nanocomposite system which was used as an anode material for high-performance lithium-ion batteries via an efficient synergistic effect. With an improved fabrication strategy, the CuO/Cu could be ultra-uniformly dispersed in nitrogen-doped carbon nanofibers. Benefiting from the in situ pyrolysis of Cu salts with improved structural stability and conductivity, the hybrid nanofiber electrode showed a specific capacity of 572.0 mA h g−1 and steady cycling performance over 500 cycles at a constant current density of 0.5 A g−1.
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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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DOI
高影响因子
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
Journal of Energy Chemistry
·
2022
·
IF 13.599
Jun Yang,Jiahui Xian,Qinglin Liu,Yamei Sun,Guangqin Li
Bismuth (Bi) has indeed inspired great interests in lithium-ion batteries (LIBs) due to the high capacity, but was still limited by the low electrical conductivity and large volume variation. Herein, a composite material based on Bi nanoparticles in situ encapsulated by carbon film (Bi@CF) is prepared successfully through a facile metal–organic framework (MOF)-engaged approach. As anode materials for LIBs, the Bi@CF composites achieved high reversible capacities of 705 and 538 mAh g −1 at 0.2 and 0.5 A g −1 after 200 cycles, and long cycling performance with a stable capacity of 306 mAh g −1 at 1.0 A g −1 even after 900 cycles. In situ X-ray diffraction (XRD) measurements clearly revealed the conversion between Bi and Li 3 Bi during the alloying/dealloying process, confirming the good electrochemical reversibility of Bi@CF for Li-storage. The reaction kinetics of this Bi@CF composite was further studied by galvanostatic intermittent titration technique (GITT). This work may provide an inspiration for the elaborate design and facile preparation of alloy-type anode materials for high-performance rechargeable batteries.
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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
危险品化学品经营许可证（带存储）