Small
·
2024
·
IF 13
Zhihao Wang,Yongyi Lu,Guangdi Zhang,Lingfeng Quan,Mingzu Liu,Haimei Liu,Yonggang Wang
Due to their significant capacity and reliable reversibility, transition metal sulphides (TMSs) have received attention as potential anode materials for sodium-ion batteries (SIBs). Nonetheless, a prevalent challenge with TMSs lies in their significant volume expansion and sluggish kinetics, impeding their capacity for rapid and enduring Na + storage. Herein, a Cu 1.96 S@NC nanodisc material enriched with copper vacancies is synthesised via a hydrothermal and annealing procedure. Density functional theory (DFT) calculations reveal that the incorporation of copper vacancies significantly boosts electrical conductivity by reducing the energy barrier for ion diffusion, thereby promoting efficient electron/ion transport. Moreover, the presence of copper vacancies creates ample active sites for the integration of sodium ions, streamlines charge transfer, boosts electronic conductivity, and, ultimately, significantly enhances the overall performance of SIBs. This novel anode material, Cu 1.96 S@NC, demonstrates a reversible capacity of 339 mAh g −1 after 2000 cycles at a rate of 5 A g −1 . In addition, it maintains a noteworthy reversible capacity of 314 mAh g −1 with an exceptional capacity retention of 96% even after 2000 cycles at 20 A g −1 . The results demonstrate that creating cationic vacancies is a highly effective strategy for engineering anode materials with high capacity and rapid reactivity.
研究领域:
材料科学
·
能源存储
✓ 已验证
产品关联
DOI
PubMed
高影响因子
Engineering
·
2021
·
IF 7.553
Qiangqiang Zhang,Quan Zhou,Yaxiang Lu,Yuanjun Shao,Yuruo Qi,Xingguo Qi,Guiming Zhong,Yong Yang,Liquan Chen,Yong-Sheng Hu
The low ionic conductivity of solid-state electrolytes (SSEs) and the inferior interfacial reliability between SSEs and solid-state electrodes are two urgent challenges hindering the application of solid-state sodium batteries (SSSBs). Herein, sodium (Na) super ionic conductor (NASICON)-type SSEs with a nominal composition of Na 3+2 x Zr 2– x Mg x Si 2 PO 12 were synthesized using a facile two-step solid-state method, among which Na 3.3 Zr 1.85 Mg 0.15 Si 2 PO 12 ( x = 0.15, NZSP-Mg 0.15 ) showed the highest ionic conductivity of 3.54 mS∙cm −1 at 25 °C. By means of a thorough investigation, it was verified that the composition of the grain boundary plays a crucial role in determining the total ionic conductivity of NASICON. Furthermore, due to a lack of examination in the literature regarding whether NASICON can provide enough anodic electrochemical stability to enable high-voltage SSSBs, we first adopted a high-voltage Na 3 (VOPO 4 ) 2 F (NVOPF) cathode to verify its compatibility with the optimized NZSP-Mg 0.15 SSE. By comparing the electrochemical performance of cells with different configurations (low-voltage cathode vs high-voltage cathode, liquid electrolytes vs SSEs), along with an X-ray photoelectron spectroscopy evaluation of the after-cycled NZSP-Mg 0.15 , it was demonstrated that the NASICON SSEs are not stable enough under high voltage, suggesting the importance of investigating the interface between the NASICON SSEs and high-voltage cathodes. Furthermore, by coating NZSP-Mg 0.15 NASICON powder onto a polyethylene (PE) separator (PE@NASICON), a 2.42 A∙h non-aqueous Na-ion cell of carbon|PE@NASICON|NaNi 2/9 Cu 1/9 Fe 1/3 Mn 1/3 O 2 was found to deliver an excellent cycling performance with an 88% capacity retention after 2000 cycles, thereby demonstrating the high reliability of SSEs with NASICON-coated separator.
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 POWER SOURCES
·
2024
·
IF 8.1
Fujie Li,Liu Gao,Yunhe Lv,Bin Cai,Chao Wang,Xiu Song Zhao
Layered sodium trititanate (Na 2 Ti 3 O 7 , NTO) is a safe and cost-effective anode material for sodium-ion batteries. However, its sluggish Na + diffusion kinetics, poor electron conductivity, and unstable layered structure against cycling pose major barriers for practical applications. Here, we show a novel doping strategy for improving Na + storage properties of NTO. Instead of doping transition metals in the Ti 4+ site, doping of alkaline metal K + by partial substitution of Na + in NTO is demonstrated. The K + -doped NTO displays enhanced Na + -storage capacity and transport kinetics, as well as improved cycling stability. It delivers a reversible Na + storage specific capacity of 162 mAh g −1 at 0.1C, a capacity retention of 75 % after 8200 cycles at 1C or after 4000 cycles at 10C. In situ X-ray diffraction characterization and density functional theory calculation results reveal that the improved performance is mainly attributed to increased exposure of the Na + storage (100) plane, widened interlayer spacing and stabilized layered structure. A full cell assembled with the K + -doped NTO as anode and Na 3 V 2 (PO 4 ) 3 @C as cathode delivers a specific energy density of 165 Wh kg −1 . This work provides an alternative approach to modifying NTO for improving its Na + storage properties.
研究领域:
材料科学
·
电化学
✓ 已验证
产品关联
DOI
高影响因子
ELECTROCHIMICA ACTA
·
2025
·
IF 5.6
Lun Ma,Qiming Liu,Huijuan Zhu,Yilin Wang,Han Su,Jie Wang
Na₄Fe₃(PO₄)₂(P₂O₇) (NFPP) has attracted growing interest as a cathode material for sodium-ion batteries (SIBs) because of its non-toxic nature, economic cost, and robust structure. However, its practical application is limited by relatively poor electronic conductivity, which affects its electrochemical performance. The introduction of Al³⁺ ions, characterized by their smaller ionic radius, leads to lattice contraction. This not only minimizes lattice distortion during the sodium ion transport process but also significantly enhances the structural stability of the material. Furthermore, coating the material with a carbon layer significantly boosts its electrical conductivity. Consequently, the optimized NFPP exhibits superior sodium-ion diffusion, enhanced electronic conductivity, and improved structural integrity. Research findings show that the formulated non-stoichiometric, carbon-coated Na₄.₄Fe₃.₄Al₀.₁(PO₄)₂.₅P₂O₇/C cathode delivers exceptional electrochemical performance.It achieves a high specific capacity of 133 mAh g⁻¹ at 0.2 C, maintains good rate capability with 91 mAh g⁻¹ at 20 C, and shows excellent cycling stability, preserving 88 % of its initial capacity after 2500 cycles at 50 C.
研究领域:
材料科学
·
电化学
✓ 已验证
产品关联
DOI
高影响因子
MICROPOROUS AND MESOPOROUS MATERIALS
·
2019
·
IF 4.182
Zhi-Cai Xing,Su-Zhen Liu,Guo-Qin Zhang,Yang Zou,Li-Feng Wang,Xiao-Ming Ren
Besides of applications in the battery, fast Na + -ion conductors have important applications in electrochemical sensors , electrochromic devices , and oxygen separation membranes . However, investigations on room-temperature solid-state Na + -ion conducting materials were scarcely reported. A Na-rich metal hexacyanoferrate (Na–FeHCF) was synthesized via a facile precipitation method and characterized by EA (Elemental Analysis), ICP (Inductively Coupled Plasma spectrometer), IR (Infrared Spectroscopy), TGA (Thermogravimetric Analysis), PXRD (Powder X-ray Diffraction), and water sorption/desorption. Na–FeHCF exhibits water-mediated ion conductivity. The Na + -ion conductivity (σ) of Na–FeHCF is 1.27 × 10 −8 S cm −1 under anhydrous condition, and it increased to 2.52 × 10 −3 S cm −1 at 98% RH (relative humidity). As a room-temperature ion conductor, its application as an impedance moisture detecting device has been explored. Na–FeHCF coating with poly(vinylidene fluoride) film on interdigital electrodes exhibited good linearity, nice repeatability, small hysteresis, short response and recovery time.
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 POWER SOURCES
·
2024
·
IF 8.1
Ao Sun,Xingxu Gao,Ling Yang,Xingyu Yu,Jing Niu,Qian Chen,Yaozong Bai,Gaojun Liu,Haoyu Dong,Lei Sheng,Tao Wang,Xianli Huang,Jianping He
As integral constituents of sodium ion batteries (SIBs), separator not only segregate positive and negative electrodes but also wield significant influence over electrochemical performance enhancement. Here, we present a hydroxyapatite nanowires composite separator (N-HAP@PE) by blade coating, boasting exceptional Na-ion transport capacity and high safety. The N-HAP@PE separator features a crosslinked ceramic network structure coating endowed with polar functional groups (-OH), providing excellent electrolyte wettability. Its compatibility with ester-based electrolytes promotes efficient transport of Na-ion between the cathode and anode, increasing the ion conductivity (0.215 mS cm −1 ) and a Na-ion transference number (0.62). Importantly, the sodiophilic HAP-NWs coating enables highly reversible Na plating and stripping while inhibiting dendrite formation. Ultimately, the N-HAP@PE separator assembled with NaNi 1/3 Fe 1/3 Mn 1/3 O 2 cathode (areal density: 13.24 mg cm −2 ) and hard carbon anode (areal density: 6.3 mg cm −2 ), exhibits excellent capacity retention (85 %) after 200 cycles at 2C. This offers a new approach for the development of high-performance and low-cost sodium-ion batteries.
研究领域:
材料科学
·
能源技术
✓ 已验证
产品关联
DOI
高影响因子
Nano Energy
·
2019
·
IF 15.548
Yue Xu,Mingyang Ou,Yi Liu,Jia Xu,Xueping Sun,Chun Fang,Qing Li,Jiantao Han,Yunhui Huang
Prussian blue analogues (PBAs) have attracted great interests due to their stable and open framework structures as novel electrode materials in rechargeable sodium-ion batteries (SIBs). However, Na + diffusion within electrode materials not only relates to many confined spaces formed by lattice frameworks for Na-ion storage but also highly involves with Na + migration channel generated by lattice periodic arrangement. In this work, the correlation between PBAs crystallinity and Na + insertion/extraction properties were systematically investigated. High-crystallized nickel hexacyanoferrate (NiHCF-h) exhibits a fast Na-ion migration process with a high diffusion coefficient of 8.1 × 10 −10 cm −2 s −2 , and a high capacity retention of 73.7% at 4.25 A g −1 . Even crystal size is six times larger than low-crystallized nickel hexacyanoferrate (NiHCF-l), the high-crystallized NiHCF-h shows a faster Na + insertion/extraction process. The basic structural characterization and pair distribution function (PDF) analysis show that NiHCF-h has a long-range lattice periodicity, enabling Na ions transfer more easily through migration channels. This demonstrates that the crystallinity of PBAs is an extremely important factor in ionic migration process, even with proved vacancies and H 2 O molecules in PBAs framework structure.
研究领域:
材料科学
·
电化学
✓ 已验证
DOI
高影响因子
Small Structures
·
2023
·Vol. 4
·期 10
·2300165
·
IF 15.9
Tingyi Huang,Jiayu Yu,Xiaojuan Huang,Junbin Li,Binhao Wang,Yalin He,Dafu Tang,Jinyu Zhang,Dong-Liang Peng,Kun Lan,Qiulong Wei
Pseudocapacitive materials with surface-redox reactions are capable of realizing high capacities at ultrahigh rates; however, it remains a challenge in the synthesis of active components with high surface area to boost surface-redox sodiation but restrain side reactions. Herein, a two-step, topochemical synthesis of 2D mesoporous TiN (2D-meso-TiN) with high surface area and rich mesoporosities is presented. It is demonstrated that the sodium-ion storage mechanism of TiN anode is based on the existence of surficial titanium oxides via redox reactions between Ti 4+ and Ti 3+ . The interconnected, highly conductive 2D-meso-TiN with high surface area largely increases the pseudocapacitive capacities, leading to a high capacity of 160/93 mAh g −1 at 0.1/10 A g −1 , which is much higher than 2D-TiN (120/72 mAh g −1 ) and commercial TiN nanoparticles (57/30 mAh g −1 ). The surface-redox (de)sodiation undergoes no destruction of crystalline TiN, which enables high initial coulombic efficiency and long-term cycles. Furthermore, a novel hybrid sodium-ion capacitor consisting of 2D-meso-TiN anode and Na 3 V 2 (PO 4 ) 3 cathode is assembled without any presodiation treatments. The hybrid capacitor delivers both high energy density (94 Wh kg −1 at 64 W kg −1 ) and high power density (38 Wh kg −1 at 4.4 kW kg −1 ), as well as long cycling stability.
研究领域:
材料科学
·
电化学
✓ 已验证
DOI
高影响因子
Advanced Energy Materials
·
2025
·
IF 26
Hongwei Bi,Xia Sun,Boyang Zhao,Ruiyi Li,Yongguang Zhang,Xiaoen Wang,Meng Zhang,Dan Luo,Zhongwei Chen
Na-ion layered oxides have attracted considerable interest due to their structural and electrochemical similarities to Li-ion counterparts, positioning them as promising cathode materials for sustainable energy storage. However, O3-type Na-ion layered oxides experience severe structural distortions and phase transitions during electrochemical cycling, which significantly deteriorate battery performance. In this study, an ultra-stable O3-type high-entropy doping cathode material is developed, NaNi 0.3 Mn 0.5 Fe 0.05 Li 0.05 Ti 0.05 Cu 0.05 O 2 (NMFLTC), for high-performance Na-ion battery. By partially substituted Ni of NaNi 0.5 Mn 0.5 O 2 (NM) with Fe, Li, Ti, and Cu, Na + diffusion and maintained the structural integrity of NMFLTC is successfully enhanced through the in situ formation of a high-entropy rock salt phase on the surface of the cathode material. This modification not only protects the cathode from structural degradation but also effectively mitigates phase transitions during cycling, leading to favored sodiation/de-sodiation electrochemistry and enhanced structure stability. Attributed to its structural superiorities, the high-entropy doping layered oxide cathode maintains 85.9% and 73.7% capacity retention at 0.1 C and 0.3 C after 200 and 600 cycles, respectively, which marks a significant improvement over traditional undoped NM cathodes. The proposed facile synthesis strategy enables the high entropy cathode material with possibility for large scale production, holding great promises to be utilized for practicalization.
研究领域:
储能
·
材料科学
·
电化学
·
纳米技术
✓ 已验证
产品关联
DOI
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.
研究领域:
材料科学
·
电化学
·
能源存储
·
固态电池
·
离子传导
·
功能材料
·
电池材料
✓ 已验证
DOI
高影响因子
JOURNAL OF THE ELECTROCHEMICAL SOCIETY
·
2018
·Vol. 165
·期 16
·A3642
·
IF 3.662
Qingzhou Wang,Yichun Wang,Xin Zhang,Gongkai Wang,Puguang Ji,Fuxing Yin
Sodium ion capacitors (SICs) represent a promising alternative of energy storage device with high energy/power densities as well as long life span. Exploration of novel anode materials with typically high rate performance is a shortcut to boost the performance of SICs. Here, we present a WSe2/reduced graphene oxide (rGO) nanocomposite synthesized by a home-made chemical vapor deposition (CVD) method. WSe2 nanoparticle is deposited uniformly at the surface of rGO nanosheets. The unique structure endows the composite with outstanding electrochemical properties. The specific capacity of 133.3 mAh g−1 at an ultrahigh current density of 60 A g−1 can be delivered. The sodium ion storage kinetics was investigated, exhibiting very high ratio of capacitive contribution during the sodium ion reaction process. The SICs based on the WSe2/rGO nanocomposite as anode show the maximum energy density of 42.8 W h kg−1 and maximum power density of 14.4 kW kg−1 as well as the superior cyclic stability, proving the promising of WSe2/rGO anode for SICs application.
研究领域:
材料科学
·
能源存储技术
✓ 已验证
DOI
高影响因子
CHEMICAL ENGINEERING JOURNAL
·
2025
·
IF 13.2
Zikang Hou,Wen Zhang,Xiangze Kong,Qingjuan Ren,Zhiheng Wang,Yufei Qin,Zhiqiang Shi
Sodium-ion batteries (SIBs) offer compelling advantages for grid-scale energy storage, owing to their safety and cost competitiveness. However, the implementation of economically competitive cellulose separators in SIBs is hindered by oversized pore structures and insufficient electrochemical stability. Here, we develop a high-performance cellulose separator through in situ polymerization of a Bis[(3-methyldimethoxysilyl)propyl]-polypropylene oxide (BSPPO) coating on commercial substrates. The BSPPO modification synergistically optimizes pore architecture for homogeneous Na + deposition while expanding the electrochemical stability window to 4.87 V through functional group engineering. Crucially, the polymer coating enables a dual-pathway Na + transport mechanism, integrating high-rate ion conduction through pore channels with polymer chain-mediated transport, resulting in superior ionic conductivity (1.33 mS cm −1 ) and Na + transference number (0.69). Hard carbon||Na cells incorporating the 20 % BSPPO-modified separator demonstrate exceptional cycling stability, maintaining 99.5 % coulombic efficiency and 90.7 % capacity retention over 100 cycles at 2C. This work introduces a dual-pathway ion transport strategy, advancing cellulose separators toward practical high-performance SIB applications.
研究领域:
材料科学
·
能源存储
·
电化学
✓ 已验证
产品关联
DOI
高影响因子
危险品化学品经营许可证（带存储）