CARBON
·
2025
·
IF 11.6
Han Yang,Chenxu Yang,Yibo Zhang,Qi Li,Jun Zhang,Ziyang Lu,Yue Chu,Quan-Hong Yang,Ying Tao
Defects in hard carbon are primarily associated with the slope capacity arising from sodium ion adsorption on defect sites for sodium storage. However, the impact of defects on plateau sodium storage remains poorly understood owing to the difficulties for hard carbon in precisely customizing carbon defects in the walls of closed pores without changing other structures such as pore geometry. Here, sieving carbon is selected as a model material to study the role of defects within closed pores in plateau sodium storage, considering that its pore forming and pore sealing by chemical vapor deposition are decoupled during material preparation. Specifically, vacancy-dominated defects are formed within closed pores by hydrogen reduction of porous carbon precursor and an identical external surface with deposited carbon covered is obtained by chemical vapor deposition. Such a vacancy-rich sieving carbon exhibits a high specific capacity of 470 mAh g −1 , along with an increased plateau capacity and improved cycling stability, remaining 72.3 % of its initial capacity after 400 cycles (342 mAh g −1 ). A series of spectroscopic studies demonstrate that increased carbon vacancies promote the formation of sodium clusters with higher reversibility in closed pores. This work provides new insights into the mechanism of plateau sodium storage and offers an effective strategy to improve the capacity and cycling stability of carbon anodes for sodium-ion batteries.
研究领域:
材料科学
·
电化学
·
储能技术
✓ 已验证
产品关联
DOI
高影响因子
Advanced Energy Materials
·
2018
·Vol. 9
·期 1
·1803035
·
IF 21.875
Peng Ge,Sijie Li,Laiqiang Xu,Kangyu Zou,Xu Gao,Xiaoyu Cao,Guoqiang Zou,Hongshuai Hou,Xiaobo Ji
As a result of its high-energy density, metal–selenides have demanded attention as a potential energy-storage material. But they suffer from volume expansion, dissolved poly-selenides and sluggish kinetics. Herein, utilizing' thermal selenization via the Kirkendall effect, microspheres of NiSe 2 confined by carbon are successfully obtained from the self-assembly of Ni-precursor/PPy. The derived hierarchical hollow architecture increases the active defects for sodium storage, while the existing double N-doped carbon layers significantly alleviate the volume swelling. As a result, it shows ultrafast rate capability, delivering a stable capacity of 374 mAh g −1 , even after 3000 loops at 10.0 A g −1 . These remarkable results may be ascribed to the Ni O C bonds on the interface of NiSe 2 and the carbon film, which leads to the faster transfer of ions, the effective trapping of poly-selenide, and the highly reversible conversion reaction. The kinetic analysis of cyclic voltammetry (CV) demonstrates that the electrochemical process is mainly dominated by pseudocapacitive behaviors. Supported by the results of electrochemical impedance spectroscopy (EIS), it is confirmed that the solid–electrolyte interface films are reversibly formed/decomposed during cycling. Given this, this elaborate work might open up a potential avenue for the rational design of metal-sulfur/selenide anodes for advanced battery systems.
研究领域:
材料科学
·
电化学
✓ 已验证
产品关联
DOI
高影响因子
JOURNAL OF COLLOID AND INTERFACE SCIENCE
·
2025
·
IF 9.7
Qin-Chao Wang,Zhaoquan Peng,Sha He,Hao Chen,Jinglong Du,Huilin Zang,Xiaoge Li,Xiuqin Zhan,Jie Han
Sodium superionic conductor NaTi 2 (PO 4 ) 3 has attracted significant interest as an anode material for sodium-ion batteries (SIBs). However, its practical application is hindered by its low inherent electrical conductivity, particularly at low temperatures. In this study, oxygen vacancies (V O ) were introduced into NaTi 2 (PO 4 ) 3 nanoribbons to enhance sodium storage performance at low temperatures. X-ray diffraction with Rietveld refinement, electron paramagnetic resonance, and X-ray photoelectron spectroscopy confirm that NaTi 2 (PO 4 ) 3 -2 nanoribbons (NTP-2) exhibit the richest V O concentration. These V O , which bridge TiO 6 octahedra and PO 4 tetrahedra, significantly enhance the antibonding interactions of Ti1–O2 and P1–O1 bonds, while stabilizing the bonding in NaTi 2 (PO 4 ) 3 . The energy barrier for Na + migration is reduced to 0.40 eV involving the V O . The optimized NTP-2 anode demonstrates superior low-temperature performance, maintaining a capacity of 106.1 mAh g −1 (about 96.1 % of its initial capacity) at −20 °C after 300 cycles. Additionally, the NTP-2 anode exhibits a moderate Na + diffusion coefficient of 1.47 × 10 –11 cm 2 s −1 at −20 °C. Furthermore, the Na 3 V 2 (PO 4 ) 3 //NTP-2 full cell retains a capacity of 64 mAh g −1 at −20 °C after 250 cycles, highlighting its potential for low-temperature applications. By integrating oxygen vacancies and nanoengineering, both electronic and ionic conductivities are significantly enhanced in NaTi 2 (PO 4 ) 3 , positioning promising applications for SIBs in low-temperature environments.
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
CARBON
·
2022
·
IF 11.307
Zirun Chen,Junlong Huang,Yin Cui,Ruowen Fu
Metal sulfide/carbon superstructures are a new class of functional materials for various energy applications due to their strong synergistic effect and favorable geometry. However, developing a controllable way to synthesize metal sulfide/Carbon superstructures with high N doping , well-designed 3D superstructure and refined metal sulfide nanoparticles remains a big challenge. Herein, we report a one-pot synthesis of metal sulfide/carbon flower-like superstructures (M x S y /CFSs) by using metal ion doped polyimine. The morphology of polyimine can be easily tuned by choosing different solvents or different amino monomers . The presence of imine bond and thiophene in polyimine not only can coordinates with metal ion and transforms them into metal sulfide during carbonization , but also provides high N and S doping for the M x S y /CFSs. Benefiting from the advantages of these structures, multiple M x S y /CFSs (such as FeS/CFSs, Co 9 S 8 /CFSs, Ni 3 S 2 /CFSs, and MnS/CFSs) with high N doping , uniform metal sulfide nanoparticles and hierarchical superstructures were fabricated by directly carbonizing metal ion doped polyimine flower-like superstructures in nitrogen atmosphere. The as-prepared Co 9 S 8 /CFSs exhibits superior sodium storage properties with stable cycling performance and excellent rate capacity. This new finding provides a novel strategy to controllably design and produce metal sulfide/carbon flower-like superstructures for the applications in energy storage.
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 Materials Chemistry A
·
2021
·Vol. 9
·期 37
·21366-21378
·
IF 12.732
Xiaomin Luo,Jianfeng Huang,Yixuan Huang,Liyun Cao,Jiayin Li,Yuhang Wang,Zhanwei Xu,Shiying Wei,Koji Kajiyoshi
Building composite structures of hollow metal sulfides and carbon material is considered an effective strategy for improving the performance of sodium storage. However, most of these composite structures are implemented using complex hard-templating and multiple-step methods. Moreover, the mechanism for enhancing the electrochemistry of carbon materials in hollow structures is not clear. In this work, a carbon-supported hollow tungsten disulfide (WS2) cuboid composite structure (marked H-WS2) was synthesized in one step by a self-templating method. On the one hand, the hollow composite structure can alleviate the volume changes during the charging and discharging processes, showing good structural stability. On the other hand, the pyrolytic carbon and nanosheet structure can effectively promote the transport of electrons/ions, exhibiting fast reaction kinetics. The H-WS2 electrode showed improved electrochemical performance for sodium storage. A high reversible capacity was achieved, 353.2 mA h g−1 after 100 cycles at 200 mA g−1. At a high current density of 5.0 A g−1, the reversible capacity of 236.7 mA h g−1 was still achieved. This work provides new insight into the synthesis of hollow metal sulfides and carbon composite structures.
研究领域:
材料科学
·
电化学
✓ 已验证
DOI
高影响因子
JOURNAL OF MATERIALS SCIENCE & TECHNOLOGY
·
2022
·
IF 10.319
Deliang Cheng,Lichun Yang,Renzong Hu,Jie Cui,Jiangwen Liu,Min Zhu
Sn-based chalcogenides are considered as one of the most promising anode materials for lithium-ion batteries (LIBs) because of their high capacities through both conversion and alloying reactions. However, the realization of full capacities of Sn-based chalcogenides is mainly hindered by the large volume variation and inferior reversibility of conversion reaction during cycling. In present work, a new ternary SnS-Mo-graphene nanosheets (SnS-Mo-GNs) composite is fabricated by a simple and scalable plasma milling method, in which SnS nanoparticles are tightly bonded with Mo and GNs. The Mo and GNs additives can effectively alleviate the large volume change of SnS upon cycling, which leads to a stable electrochemical framework. Moreover, they can significantly suppress the Sn agglomeration in lithiated SnS, which enables highly reversible conversion reaction during cycling. As anode for LIBs, the SnS-Mo-GNs composite exhibits a high initial coulombic efficiency of 86.9% (almost complete reversibility of SnS, ∼97.3%), high cyclic coulombic efficiency after initial three cycles (> 99.5%), and long lifespan (up to 600 cycles). Moreover, it also demonstrates superior electrochemical performance for sodium storage. Thus, this work demonstrates a potential anode for batteries application and provides a viable strategy to obtain highly reversible and stable anodes for lithium/sodium storage.
研究领域:
材料科学
·
电化学
·
能源存储
✓ 已验证
DOI
高影响因子
ChemistrySelect
·
2025
·Vol. 10
·期 16
·e202500414
·
IF 2
Qianqian Ma,Yilin Wang,Zonglin Yi,Lijing Xie,Fangyuan Su,Guohua Sun,Gongling Hui,Wei Xie,Chengmeng Chen,Yaqin Hou
Graphical This study prepares phenolic resin-based carbon microspheres featuring small size (2–4 µm), monodispersity, and narrow particle size distribution by regulating the catalyst content. Subsequently, it explores the differences in sodium storage behavior. The optimal sample exhibits a plateau region capacity proportion of 75.6% and an initial Coulombic efficiency (ICE) of 85.02%. Phenolic resin is considered a promising precursor for advanced hard carbon anodes in sodium-ion batteries (NIBs) due to its ease of design, structural stability, and high residual carbon yield. However, the practical application of hard carbon is affected by its closed-pore content and structure. Here, we achieve fine control over the cross-linking structure of phenolic resin precursors by adjusting the catalyst content in the system, followed by high-temperature carbonization to produce phenolic resin-based carbon microspheres with small sizes (2–4 µm), monodispersity, and a narrow spherical diameter distribution. Based on this, we deeply explore the intrinsic relationship between the microstructure of these resin-based carbon microspheres and their sodium storage performance in NIBs. This strategy can provide a feasible molecular cross-linking engineering approach for the development of closed pores in phenolic resin-based hard carbon to tune electrochemical properties such as the plateau region capacity.
研究领域:
材料科学
·
电化学
✓ 已验证
产品关联
DOI
高影响因子
Energy Storage Materials
·
2018
·
IF 0
Chunyu Cui,Zengxi Wei,Jiantie Xu,Yiqiong Zhang,Shenghong Liu,Huakun Liu,Minglei Mao,Shuangyin Wang,Jianmin Ma,Shixue Dou
A (MoS 2 /carbon fiber (CF))@MoS 2 @C hybrid has been prepared by an efficient method combining the electrospinning, hydrothermal and annealing techniques. Coupled with graphite as cathode, the hybrid enables the full cell ( i.e. , dual ion batteries) to deliver a high initial discharge capacity of 112.3 mAh g −1 at 0.2 A g −1 and maintain a high reversible capacity of 90.5 mAh g −1 at 0.5 A g −1 after 500 cycles. These remarkable sodium storage properties of (MoS 2 /CF)@MoS 2 @C are mainly attributed to its three-dimensional framework with its highly conductive, cross-linked structure, which effectively increases the conductivity of the hybrid and the mass loading of MoS 2 . Moreover, the MoS 2 nanoplates embedded inside CF, as well as being sandwiched between the CF/MoS 2 and a thin carbon layer , also can effectively buffer the pulverization and aggregation of the electrode, and thus maintain the structural integrity of (MoS 2 /CF)@MoS 2 @C during the charge-discharge process.
研究领域:
材料科学
·
电化学
✓ 已验证
产品关联
DOI
ENERGY & FUELS
·
2020
·
IF 3.421
Ming-Ming Hu,Huawen Huang,Qiang Gao,Yan Tang,Yuwen Luo,Yuanfu Deng,Lei Zhang
Incorporating redox-active quinones with linkers to form covalent organic frameworks (COFs) could effectively improve their electrochemical performances when used as electrode materials. Their stable frameworks are able to inhibit dissolution of quinone in the organic electrolyte, and ordered porous structures enhance the ion diffusion rate. Condensing redox-active quinones with linkers containing more replaceable sites could increase the redox-active moieties in COF electrode materials, which would effectively increase their specific capacities. Herein, 2,6-diaminoanthraquinone (DAAQ) was condensed with the hexachlorocyclotriphosphazene (HCCP) linker containing six replaceable sites of −Cl to form ordered porous DAAQ–HCCP COF. All of the −Cl sites of the HCCP linker were replaced by redox-active DAAQ during condensation reaction, significantly increasing the content of electroactive moieties in the framework. Benefiting from the stable framework and ordered porous structures, DAAQ–HCCP COF exhibits higher cycling stability than DAAQ and outstanding rate performance when used as the anode for sodium-ion batteries. The prepared COF displays specific capacities of 88 mA h g–1 at 100 mA g–1 after 100 cycles and 72 mA h g–1 at 2000 mA g–1 after 1000 cycles. The present work provides a new strategy to design COF with more redox-active sites for organic rechargeable batteries.
研究领域:
材料科学
·
电化学
✓ 已验证
产品关联
DOI
高影响因子
APPLIED SURFACE SCIENCE
·
2022
·
IF 7.392
Xusheng Dong,Ruizheng Zhao,Bin Sun,Tengsheng Zhang,Boya Wang,Yanyan He,Tingting Gao,Dongliang Chao,Guowei Zhou
Transition metal selenides are regarded as potential sodium storage materials for their high theoretical capacity and superior electrical conductivity. However, unsatisfied cycle stability and rate capability, which is caused by its intrinsic structural instability and sluggish conversion reaction, greatly hinder the application. Herein, in-situ electrostatic attraction and selenization process are used to construct Ni 0.5 Co 0.5 Se 2 /Ti 3 C 2 T x composite, in which the homogeneous Ni 0.5 Co 0.5 Se 2 nanoparticles are anchored in the Ti 3 C 2 T x MXene architecture. Based on the unique confinement effect and strong chemical interface coupling, the volume expansion and aggregation of the Ni 0.5 Co 0.5 Se 2 /Ti 3 C 2 T x anode during the cycling process are effectively prevented. Furthermore, the evenly Ni 0.5 Co 0.5 Se 2 bimetallic selenides nanoparticles endow rapid charge transfer and redox kinetics due to shortened Na + diffusion distance and more accessible active sites. As a result, the as-prepared Ni 0.5 Co 0.5 Se 2 /Ti 3 C 2 T x anode exhibits long cycle stability over 1000 cycles at 2.0 A g −1 , pushing forward the construction of advanced conversion-type anode for high-performance sodium-ion batteries.
研究领域:
材料科学
·
电化学
·
纳米技术
✓ 已验证
产品关联
DOI
高影响因子
Journal of Materials Chemistry C
·
2022
·Vol. 10
·期 47
·18052-18062
·
IF 8.067
Yayun Zheng,Xirui Kong,Lang He,Yi Song,Yan Zhao
A facile solid-state Matryoshka doll-like microwave strategy is developed to synthesize composites of NixSey and nitrogen-doped porous carbon (N–C). The crystal structures and morphology of NixSey/N–C are investigated with different feeding mass ratios of Ni/Se and at different microwave processing times. Thereinto, NiSe2/N–C is rapidly prepared in just 20 minutes. The physical–chemical properties of NiSe2/N–C are further investigated and the composite has shown good ion/electron transfer kinetics and structural stability for sodium storage. When employed as the anode of sodium ion batteries (SIBs), NiSe2/N–C shows a high reversible capacity of 374.4 mA h g−1 at 0.2 A g−1 and excellent cycling stability, retaining 95% of its initial capacity at 1.0 A g−1 after 2000 cycles. The good electrochemical performance is attributed to the synergistic effect between the highly active NiSe2 nanoparticles and the 3D conductive N–C frameworks, which expedites the charge-transfer rate and improves the reversibility of the charging/discharging reactions. The excellent Na+ storage kinetics of the NiSe2/N–C electrode results from its low adsorption energy of −0.94 eV and low energy barrier of 0.818 eV. This work provides a feasible microwave synthetic strategy to fabricate SIB electrode 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
Nature Communications
·
2025
·Vol. 16
·期 1
·1-11
·
IF 15.7
Hou Jingrong,Chen Tsung‐Yi,Ait Tamerd Mohamed,Liu Jie,Huang Wei-Hsiang,Hadouchi Mohammed,Zhu Yiming,Shi Xinyue,Guo Shasha,Yang Menghao,Shi Yongchao,Tang Mingxue,Ma Jiwei
Cycling positive electrode materials with high voltages and long lifetimes remains a challenge. On the one hand, operating electrodes at high voltages is usually accompanied by severe structural distortions and irreversible reactions. On the other hand, the significant volume variation upon Na + insertion/extraction limits the long cycling life. Here, we report a defective positive electrode material with a chemical formula of Na 3.2 □ 0.8 Co 0.5 Fe 0.5 V(PO 3.9 F 0.1 ) 3 (□ represents Na vacancy) through fluorine doping with activated reversible and fast Na + intercalation/deintercalation to increase the energy and power densities. Notably, this positive electrode material achieves a high reversible specific capacity of 151 mAh g −1 and prominent rate performance ranging from 1.5–4.2 V vs. Na + /Na, as well as a long lifespan of 6000 cycles under a high rate of 5 A g −1 with a capacity retention of ~94%, due to the activated cationic defect sites which reduces the transport barrier at the Na(1) site. This approach is expected to be applied to the rational design of polyanionic materials for batteries.
研究领域:
材料科学
·
电化学
·
储能
·
电池技术
·
无机化学
✓ 已验证
产品关联
DOI
PubMed
高影响因子
危险品化学品经营许可证（带存储）