DALTON TRANSACTIONS
·
2022
·Vol. 51
·期 9
·3472-3484
·
IF 4.569
Lei Xu,Zhipeng Gong,Yinglin Qiu,Wenbo Wu,Zunxian Yang,Bingqing Ye,Yuliang Ye,Zhiming Cheng,Songwei Ye,Zihong Shen,Yuanqing Zhou,Qiaocan Huang,Zeqian Hong,Zongyi Meng,Zhiwei Zeng,Hongyi Hong,Qianting Lan,Tailiang Guo,Sheng Xu
Metal sulfides, one kind of electrode material with very high theoretical capacity, have been widely studied for use in lithium and sodium ion batteries. However, there are some problems hindering their applications in electrodes, such as low conductivity and volume expansion. The MOF introduces metals with different coordination strengths into an existing MOF structure, which improves the performance of the electrode to a certain extent. In this paper, Fe/Zn bimetallic MOF rod-like superstructure was prepared based on Ostwald theory. Accompanied by sulfuration, the MOF was effectively combined with MoS2 and GO, and the objective materials Fe7S8-C/ZnS-C@MoS2/rGO composites were successfully prepared. The MOF material provides a good frame and an efficient electron transport path, while the robust rGO wall effectively inhibits the pulverization of materials during the lithium/sodium intercalation/escalation courses. This particular material exhibited excellent cycling and rate capability performance when used in Li/Na-ion batteries. When used in Li-batteries, the electrode material delivered a specific capacity of 1598.3 mA h g−1 at 0.1 A g−1 and remained at 1196.7 mA h g−1 even after about 100 cycles and further exhibited a specific capacity of 368.68 mA h g−1 at the current rate of 5 A g−1 even after 1000 cycles, respectively. As for sodium batteries, these electrode materials exhibited an initial reversible capacity of 1053.6 mA h g−1 at 0.1 A g−1 and the reversible capacity was still as high as 592.2 mA h g−1 after 200 cycles. It is perhaps that this composite material with its particular architecture and composition is greatly beneficial for electron transfer and Li/Na ion diffusion. In the repeated physicochemical/nutrifying process, the appropriate distance between adjacent MOFs is of great help in preventing volume changes and thus improving the electrochemical performance.
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高影响因子
JOURNAL OF POWER SOURCES
·
2024
·
IF 8.1
Jin Zhao,Xinsheng Xu,Jian Chen,Yang Liu,Jiawei Wu,Feijian Lou,Yangyang Fan,Yun Qiao
Rechargeable Li–CO 2 battery is a facilitative and promising device for the conversion of CO 2 to electrochemical energy. However, it remains a challenge to enhance the sluggish decomposition kinetics of lithium carbonate as the discharge product. Herein, the Ru nanoparticles anchored on N-doped mesoporous hollow carbon nanospheres (Ru-AHCNs) are designed as cathode to enhance the electrochemical performance of Li–CO 2 battery. The Ru-AHCNs cathode displays a high discharge specific capacity of 11194.4 mA h g −1 at the current density of 100 mA g −1 . In addition, the Ru-AHCNs cathode can stably run over 50 cycles and maintain a small overpotential (<1.38 V) with a limited capacity of 1000 mA h g −1 at 100 mA g −1 . The excellent stability and catalytic activity of the cathode are ascribed to the following factors: (i) Uniform deposition of Ru nanoparticles in hollow carbon nanospheres can enhance the decomposition of Li 2 CO 3 and provide considerable exposure to active sites. (ii) N-doped mesoporous hollow carbon nanospheres can provide abundant electron transport channels and promote the nucleation of discharge products. These results evidently prove the reversible formation and decomposition of the discharge products, indicating that Ru-AHCNs cathode possesses excellent bifunctional catalytic activity.
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DOI
高影响因子
GREEN CHEMISTRY
·
2025
·
IF 9.2
Yongji Xia,Sheng Lin,Jian Yan,Renjie Xu,Yingpeng Du,Chunxiao Song,Dong-Liang Peng,Zhidong Zhou,Jiajia Han,Guanghui Yue
Spinel-type Co3O4 has been identified as a highly prospective cathode catalyst for lithium-oxygen batteries (LOBs), attributable to its distinctive bimetallic active sites that manifest exceptional bifunctional catalytic characteristics. Nonetheless, the practical implementation of this process is constrained by the inherent conductivity limitations of Co3O4 and the suboptimal utilization of active sites. In this study, a Cu-Mn bimetallic doping strategy is employed to prepare a spherical-like structure of Co3O4 formed by self-assembling one-dimensional nanorods. The introduction of Cu²⁺ results in a reduction of the surface energy of the system, thereby facilitating the directional growth of the nanorods. The redox-active Mn³⁺/Mn⁴⁺ pairs exhibit an inhibitory effect on Ostwald ripening, achieved by stabilizing the fine particles during synthesis and regulating solute diffusion kinetics. This combined action of Cu and Mn enhances active site exposure and optimizes charge transfer kinetics. Furthermore, the doping of bimetallic ions resulted in the redistribution of the Co3+/Co2+ ratio, optimizing the electronic structure for efficient charge transfer during the reaction. The combination of tailored electronic states and optimized nanostructures demonstrates excellent dual-functional catalytic activity for ORR and OER, with a half-wave potential of 0.71 V (vs RHE) for OER and an overpotential of 400 mV (10 mA cm-2) for ORR. The assembled LOBs can be stably cycled up to 450 cycles and an ultra-high discharge capacity of 7268 mAh g-1 for LOBs. This study provides a novel reference for the design of efficient bifunctional catalysts.
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高影响因子
ADVANCED MATERIALS
·
2025
·
IF 26.8
Jiajun He,Yun Huang,Huihui Li,Jin Bao,Heguo Zeng,Zhanpeng Du,Fengliang Wang,Xiaoyan Ma,Xuepeng Zhong,Bo Yu,Xing Li,Mingshan Wang,Yuanhua Lin,Bingshu Guo,Haijun Cao
This study employs molecular engineering to modulate HOMO levels and electronic structures, designing high-performance phthalate-based anodes (ZnPA, CaPA, CuPA) to address challenges like limited capacity and poor cycling in organic lithium-ion batteries. CuPA delivers 749 mAh g −1 after 100 cycles at 0.1 A g −1 and retains 200 mAh g −1 after 2500 cycles at 1 A g −1 . ZnPA achieves 650 mAh g −1 at 0.1 A g −1 and maintains 200 mAh g −1 after 1500 cycles at 1 A g −1 . CaPA shows increased capacity at higher current (197 mAh g −1 at 1 A g −1 ) due to (100) plane expansion. Redox mechanisms differ: CuPA and ZnPA carbonyl group facilitates lithium storage by a reversible enolization reaction, while the activated benzene ring exhibits redox activity for reversible lithiation/delithiation, with Cu 2+ irreversibly reducing to Cu⁺, while Zn 2+ remains stable. CaPA enables efficient lithium storage by the reversible intercalation and deintercalation of lithium ions on its (100) crystallographic plane. Full cells with LiFePO 4 exhibit excellent performance: CuPA||LFP and ZnPA||LFP retain over 50% capacity after 1000 cycles; CaPA||LFP shows outstanding rate capability (103 mAh g −1 at 4C). This work demonstrates that molecular structural engineering is an effective strategy for enhancing organic electrode materials.
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DOI
PubMed
高影响因子
Science China-Chemistry
·
2014
·Vol. 57
·期 5
·662-668
·
IF 1.516
Chai YunFeng,Pan YuanJiang
Protonation and alkali-metal cation adduction are the most important ionization processes in soft-ionization mass spectrometry. Studies on the fragmentation mechanism of protonated and alkali-metal-cationized compounds in tandem mass spectrometry are essential and helpful for structural analysis. In some cases, it was often observed that a compound attached by different alkali-metal cations (or proton) exhibits similar fragmentation patterns but the relative abundances of product ions are different. This difference was considered to derive from the different electrostatic interactions of alkali-metal cations (or the bonded effect of proton) with the analyte. The alkali-metal cation with a smaller ionic radius shows stronger electrostatic interaction with the molecule because of its higher charge density. In addition, the bonded effect of the proton is stronger than the electrostatic interaction of the alkali-metal cation. In the present study, which used McLafferty-type rearrangements of even-electron ions ([M + Cat] + , Cat = H, Li, Na, K) as model reactions, the effect of cation size in mass spectrometric fragmentation reactions is highlighted. These considerations were also successfully applied to interpret the similar but distinct fragmentation behavior of proton and alkali-metal cation adducts of a synthetic compound (2-(acetamido(phenyl)methyl)-3-oxobutanoate) and a drug (entecavir).
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高影响因子
ENERGY & FUELS
·
2021
·
IF 3.605
Yuehua Huang,Wangwu Li,Jiao Peng,Zhenyu Wu,Xingxing Li,Xianyou Wang
Silicon (Si) or Si-based compounds have been paid much attention in the field of lithium-ion battery anodes on account of desirable theoretical capacity, moderate working voltage, abundant resources, and bing nontoxic. However, some disadvantages, including inferior electrical conductivity and enormous volume change in the process of lithiation/delithiation, hinder their widespread application in commercial lithium-ion batteries. To solve the above problems, we designed and prepared the graphite/silicon/carbon nanotubes/carbon (GSCC) composites with hierarchical structure. Herein, the graphite can absorb the bulk expansion stress of the Si particles. The carbon layer carbonized by pitch can further mitigate the volume change and physically separate Si and electrolyte, and an admirable conductive network can be provided by the carbon nanotube. As a consequence, the as-prepared GSCC electrode possesses a capacity of 1100.6 mAh g–1 at 0.2 A g–1 and high initial coulomb efficiency (ICE) of 78% and has a good capacity retention of 73%. Therefore, the combinational design of the graphite/silicon/carbon nanotubes/carbon for the preparation of a silicon-based anode material is a meaningful exploration for large-scale production and commercial application in lithium ion batteries.
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高影响因子
Coatings
·
2023
·Vol. 13
·期 3
·626
·
IF 3.4
Xinglong Chen,Wenyue Guo,Rui Li,Peng Du,Xiaowen Zhan,Shan Gao
The development of cobalt-free P2-Na2/3Ni1/3Mn2/3O2cathodes is hampered by poor electrochemical performance, resulting from structural instability during high-voltage cycling. Herein, Li+and F−ions are introduced simultaneously via a simple sol–gel method. The F not only enters the lattice but forms chemically stable NaF on the surface. The modified electrode delivered significantly better electrochemical performance than the pristine one, including much-enhanced capacity retention (64% vs. 36%, 100 cycles) at 0.5 C and a four-time higher capacity output at 10 C. The ex situ XRD and in situ Raman analysis revealed cyclability enhancement mechanisms in terms of inhibiting the P2–O2 phase transition and Na+/vacancy ordering. The conductivity measurements (based on AC impedance and DC polarization) and GITT analysis proved, on both bulk material and electrode levels, that Na+conduction and, thus, rate performance is notably promoted by doping. The individual contribution of Li and F to the overall performance improvement was also discussed. Furthermore, a solid-state sodium-metal battery was successfully demonstrated with the modified cathode. The above results verify that Li+/F−incorporation can enable enhancements in both cyclability and rate capability of the P2-Na2/3Ni1/3Mn2/3O2cathodes and are expected to provide a new perspective for the rational design of high-performance layered oxide cathode materials for progressive sodium-ion batteries.
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高影响因子
ENERGY & FUELS
·
2020
·
IF 3.421
Kaixiang Shen,Zishuai Zhang,Shaofeng Wang,Qiang Ru,Lingzhi Zhao,Linfeng Sun,Xianhua Hou,Fuming Chen
Bismuth nanoparticles were synthesized in three-dimensional (3D) network carbon nanofibers by the electrospinning and carbonization method. The bionic structures with cucumber-shaped carbon nanofibers@Bi nanoparticles (CCNs@BiNs) have flexibility and a self-supporting backbone, which can directly be used as anode materials for lithium-ion batteries (LIBs). The carbon shells that wrap bismuth nanoparticles can effectively buffer the volume expansion during the lithiation process. Owing to the special structure and pseudocapacitive effect, the CCNs@BiNs electrodes can deliver a superb cycling capacity of 322 mAh g–1 at 0.25 A g–1 after 500 cycles. The rate capability with high recoverability demonstrates a capacity of 450 mAh g–1 when the current density returns to 0.1 A g–1. The binder-free and foldable CCNs@BiNs will have potential for use in energy storage devices with high demand and requirement of flexibility and long cycling.
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高影响因子
Energy Technology
·
2019
·Vol. 7
·期 11
·1900754
·
IF 3.163
Shikun Cheng,Qiang Ru,Zhenglu Shi,Yuqing Gao,Yang Liu,Xianhua Hou,Fuming Chen,Francis Chi-Chung Ling
Plant oil–inspired 3D flower-like Zn 3 V 3 O 8 nanospheres coupled with nitrogen doped (N-doped) carbon synthesized via the microemulsion/calcination strategy are used as anodes for lithium-/sodium-ion batteries (LIBs/SIBs). The synergistic interaction between the unique 3D flower-like structure and the existence of N-doped carbon can provide enough space to buffer volume expansion during the Li + /Na + intake/outlet process and enhance conductivity, respectively. Thus, the material delivers progressive electrochemical performance. Specifically, the Zn 3 V 3 O 8 nanospheres exhibit a reversible specific capacity of 1140.6 mAh g −1 after 200 cycles for LIBs and 113.0 mAh g −1 after 400 cycles for SIBs at a current density of 200 mA g −1 . Furthermore, the Zn 3 V 3 O 8 nanospheres electrode owns rate capability for LIBs such as 933.8, 847.9, 780.8, and 664.1 mAh g −1 at elevated current densities of 200, 400, 800, and 1600 mAh g −1 , respectively. In addition, it delivers reversible capacities of 207.5, 119.2, 74.1, and 42.7 mAh g −1 at 100, 200, 500, 1000, and 2000 mA g −1 for SIBs, respectively.
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高影响因子
CERAMICS INTERNATIONAL
·
2019
·
IF 3.45
Xiaohui Tian,Yanbin Zhu,Zhihao Tang,Pengfei Xie,Angulakshmi Natarajan,Yingke Zhou
A unique 3D porous graphene aerogel wrapped LiNi 0.6 Co 0.2 Mn 0.2 O 2 nanoparticle composite (NCM@GA) was prepared via a facile coprecipitation followed with a hydrothermal treatment . The morphological and structural characterizations reveal that the graphene nanosheets adhere tightly to the NCM nanoparticle surface and randomly intertwine to form a three-dimensional porous conductive aerogel network. The galvanostatic charge/discharge tests imply that the NCM@GA composite displays a high initial discharge capacity of 189.9 mAh g −1 (0.1 C), an excellent rate capability of 130.9 mAh g −1 (5 C) and 106.8 mAh g −1 (10 C), and an outstanding cyclic stability (an average decay rate of approximately 0.04% over 200 cycles at 1 C). The outstanding electrochemical performance is due to the synergy between the porous GA framework and the well-dispersed NCM nanoparticles, which facilitates the rapid diffusion of both Li + and electrons and accommodates the volumetric change during the Li + insertion/deinsertion process. The novel electrode design strategy described here is promising for constructing other advanced composite cathodes used in power Li-ion batteries.
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高影响因子
ELECTROCHIMICA ACTA
·
2022
·
IF 7.336
Xueqian Ji,Yuxing Xu,Yuncheng Zhou,Jiechen Song,Hailan Feng,Pengfei Wang,Jun Yang,Fuchang Zhuge,Haijiao Xie,Qiangqiang Tan
Because of high energy density and work voltage, the Li-rich materials are considered to be one of the most promising next-generation lithium-ion batteries. However, the commercial applications are limited by the capacity loss, poor rate capability, and voltage decay during cycling. Herein, functionalizing the surface of Li 1.2 Mn 0.54 Ni 0.13 Co 0.13 O 2 by Ca 0.95 Bi 0.05 MnO 3 is proposed, which suppresses the formation of the oxygen vacancies and maintains structural stability by high oxygen affinity and alleviative electrolyte corrosion. Electrochemical tests demonstrate that this admirable electrode delivers excellent cycling stability. The Li-rich electrode decorated with 5 wt.% Ca 0.95 Bi 0.05 MnO 3 exhibits a stable capacity retention of 86.5% at 0.1C after 200 cycles and an excellent full cell performance with the energy retention of 95.4% at 0.1C after 100 cycles. Moreover, the voltage decay of the modified material is restrained from 5.02 to 3.07 mV per cycle over 200 cycles. The finding here sheds new light on the development of the better Li-rich cathodes for improving electrochemical performance of electrode materials.
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高影响因子
Materials Today Nano
·
2022
·
IF 13.364
Q. Sun,X. Chen,J. Xie,C. Huang,X. Xu,J. Tu,C. Shen,Y. Jin,K. Zhang,F. Chen,T. Zhu,X. Zhao,J. Cheng
Garnet-type Li 7 La 3 Zr 2 O 12 (LLZO) ceramics has been considered as an ideal solid-state electrolyte for Li metal cells because of its high ionic conductivity and relatively stable interface with Li. However, it is electrochemically incompatible with some high-voltage cathodes, e.g. LiCoO 2 . In this work, a nanoscale Li 1.3 Al 0.3 Ti 1.7 (PO 4 ) 3 (LATP) fast ion conductor was coated on LiCoO 2 (only 1 wt% LATP), bringing obviously enhanced interfacial compatibility with a composite electrolyte composed of Al, Nb-codoped LLZO and polyethylene oxide (PEO). A free-standing, flexible and ultrathin (20 μm) electrolyte membrane was successfully fabricated by a facile and scalable route, even though with a high ceramics content (67 wt%). Quasi-solid-state coin and pouch-type Li cells were assembled with the LATP-coated LiCoO 2 cathode, free-standing composite electrolyte and Li anode, together with soft interface modification by in-situ polymerization. The cells show stable cycling due to combined factors of enhanced electrode/electrolyte compatibility, ultrathin nature of the electrolyte membrane and the in-situ built soft interface. The pouch cells can be cycled for 300 cycles at 0.3 C and 60 °C with 80% retention. The pouch cells can endure abuse tests of bending, cutting and nail penetration. At a practical LiCoO 2 loading of 3 mAh cm −2 , the Li|LiCoO 2 pouch cell still shows stable cycling with 90% retention after 100 cycles at 60 °C (0.2 C charge/0.5 C discharge). This work provides a practical method to fabricate high-performance solid-state Li cells.
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高影响因子
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