Small
·
2025
·
IF 12.1
Wenwen Yin,Xing Zhi,Yanyan Li,Jiawei Ma,Bernt Johannessen,Fangxi Xie,Mingmei Wu
Sodium superoxide is considered the preferred discharge product for sodium-air batteries (SABs) due to the reversible electrochemistry of the O 2 /O 2 − redox pair and the consequent low charge overpotential. However, air cathodes of SABs based on mono-metal systems have not yet achieved optimal adsorption of the discharge products, leading to suboptimal performance of SABs. In this study, we present FeCo bimetallic alloy particles anchored on carbon nanotubes (FeCo/C) as a demonstration of a bimetal-based air cathode for SABs. Na-air batteries with FeCo/C cathode can achieve a low overpotential gap of 500 mV, a high discharge capacity of 3392.20 mAh g −1 , and excellent cyclic stability over 200 cycles (800 h). Ex-situ spectroscopy confirms the successful formation of sodium superoxide as the main discharge product, establishing a clear correlation between excellent performance and discharge product composition and verifying the effectiveness of the bimetallic alloy cathode. Theoretical calculations further reveal that the bimetallic-based air cathode exhibits improved adsorption of sodium superoxide, significantly enhancing the performance of SABs. This work pioneers the use of bimetal alloy strategies to optimize discharge products in SABs, paving the way for their practical application.
研究领域:
材料科学
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电化学
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产品关联
DOI
PubMed
高影响因子
Small
·
2022
·Vol. 18
·期 18
·2107199
·
IF 15.153
Zhaowei Sun,Yadong Ye,Jiawen Zhu,En Zhou,Junjie Xu,Minghui Liu,Xianghua Kong,Song Jin,Hengxing Ji
Na metal anode (NMA) is one of the most promising candidate materials for next-generation low-cost sodium metal batteries. However, the preferred deposition of Na metal at the anode/separator interface increases the risk of dendrite penetration of the separator, consequently, reduces safety and life of batteries with NMA. In this study, a Na deposition-regulating strategy is shown by designing a gradiently graphitized 3D carbon fiber (CF) framework as host (grad-CF), whereby Na is guided to deposit preferentially at the bottom of the anode, safely away from the separator. The obtained Na anode significantly reduces the probability of dendrite-induced short circuits. The grad-CF host enables NMA stable cycling at a high current density of 6 mA cm −2 . When the Na@grad-CF is applied as anode in full cells pared with Na 3 V 2 (PO 4 ) 3 (NVP) cathode, it exhibits a reversible capacity of 73 mA h g −1 after 500 cycles with a low decay rate of 0.13%.
研究领域:
材料科学
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电化学
✓ 已验证
DOI
高影响因子
Journal of Materials Chemistry A
·
2020
·Vol. 8
·期 16
·7828-7835
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IF 11.301
Jiayi Yang,Zhonghui Gao,Thimo Ferber,Haifeng Zhang,Conrad Guhl,Liting Yang,Yuyu Li,Zhi Deng,Porun Liu,Chuanwei Cheng,Renchao Che,Wolfram Jaegermann,RenéHausbrand,Yunhui Huang
The sodium (Na) anode suffers severe interfacial resistance and dendrite issues in a classic NASICON-type Na3Zr2Si2PO12 (NZSP) electrolyte, resulting in poor electrochemical performance for solid-state Na metal batteries. There has been little success in the reduction of interfacial resistance in recent years. The exact mechanism of this resistance has not been fully understood because of little information about the interface. In this work, we effectively address the large interfacial resistance issue and the metal dendrite problem between the Na anode and NZSP by introducing a TiO2 film as an active interphase. We employ quasiinsitu X-ray photoelectron spectroscopy (XPS) to uncover the interphase formation mechanism at the Na/TiO2–NZSP electrolyte interface. Our quasiinsitu XPS results confirm the formation of a sodiated-TiO2 interphase upon stepwise Na evaporation on the surface of the NZSP electrolyte. Further investigation by molten Na contact angle measurements, impedance spectroscopy and DFT calculations demonstrates that the sodiated-TiO2 interphase promotes Na ion transport between the Na anode and NZSP electrolyte. Moreover, the electrostatic potential formed at the NZSP/NaxTiO2 interface can effectively reduce electronic conductivity at the interface and hence prevent the growth of sodium dendrites. A representative paradigm for interphase design is provided to address the interface contact for developing stable solid-state batteries with high performance.
研究领域:
材料科学
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电化学
✓ 已验证
DOI
高影响因子
Small
·
2025
·
IF 12.1
Teng Li,Jiameng Zheng,Jinwei Wu,Zhenrui Li,Anding Xu,Songping Wu,Yurong Yan
Na–Se batteries with high theoretical capacity and rich natural abundance are regarded as desirable substitutes for lithium-ion batteries in the predicament of scarce lithium resources. However, the huge volume expansion of Se and the shuttling effect of polyselenides hinder the development of Na–Se batteries. Herein, the hierarchically porous carbon encapsulated Se (Se/HPC) is successfully prepared by molten Se diffusing into the multi-scaled orthogonal channels of In-MOF derived carbon matrix. The Se/HPC realizes effective nano-confinement of Se phase and accelerates charge transfer during cycling to efficiently buffer the volume expansion of Se, which avoids the shuttling effect and promote electrochemical performance. The Se/HPC achieves admirable electrochemical performance for delivering high capacity of 465 mAh g −1 at a high current density of 50 A g −1 and 533 mAh g −1 after 2800 cycles at 10 A g −1 with 0.003% capacity decay per cycle. Density functional theory calculations demonstrate that the Se─C bond is thermodynamically and kinetically beneficial for the adsorption/diffusion of Na + . This work can inspire the further exploration of utilizing the intrinsic crystal structure of MOF to construct a hierarchically porous carbon matrix in situ as carrier for the active Se component, and provide inspiration for future construction of higher-performance electrode materials.
研究领域:
材料科学
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电化学
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产品关联
DOI
PubMed
高影响因子
JOURNAL OF CHEMICAL AND ENGINEERING DATA
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2024
·
IF 2
Hongxiang Xu,Wentao Li,Junfeng Wang,Jiushuai Deng,Shangqing Chen
After the NaClO solution was used to purify acetylene gas, the solution contained significant amounts of NaCl, Na2SO4, and Na2HPO4. The phase equilibrium data is the most important basic information for recovering sodium salts. In this study, the solubilities and dry-salt phase diagram for the system (Na+//Cl–-SO42–-HPO42–-H2O) were systemically studied. The dry-salt phase diagram contained one invariable point, three univariate solubility curves, and three single salt crystallization regions corresponding to NaCl, Na2SO4, and Na2HPO4·12H2O at 298.15 K and 0.1 MPa. Based on the ELEC-NRTL and Pitzer model embedded in the Aspen Plus, the phase equilibrium data for the ternary subsystem (Na+//Cl–-SO42–-H2O, Na+//Cl–-HPO42–-H2O, and Na+//SO42–-HPO42–-H2O) at 298.15 K and 0.1 MPa taken from the literature were first predicted to verify the applicability of parameters from the default database and literature. Subsequently, the models were optimized by literature solubility data, and then, the obtained parameters can well predict the phase equilibrium data for the ternary subsystem at 298.15 K and 0.1 MPa. All of these will provide basis data for the separation of sodium salt from the Na+//Cl–-SO42–-HPO42–-H2O system.
研究领域:
化学工程
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环境科学
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产品关联
DOI
高影响因子
JOURNAL OF COLLOID AND INTERFACE SCIENCE
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2024
·
IF 9.4
Jun Xu,Fang Cao,Xiaoyuan Yang,Xing Chen,Yan Zhang,Junwei Chen,Liqing He,Wenpei Kang
In this work, the nanocables of few-layered ReS 2 nanosheets sandwiched between carbon nanotubes (CNTs) and nitrogen-doped amorphous carbon (NC) coating (i.e., CNT@ReS 2 @NC) are synthesized as high-performance anodes of both potassium-ion batteries (PIBs) and sodium-ion batteries (SIBs). The CNT@ReS 2 @NC nanocables with dual carbon modifications have the several advantages for efficient K + /Na + storage. The few-layered ReS 2 nanosheets with a wide interlayer spacing of 0.64 nm contribute to accelerated reaction kinetics for fast K + /Na + intercalation/extraction. The carbon nanotube skeleton with a hollow interior can effectively relieve the volume change and serve as a robust conductive network to boost structural stability . The NC layer provides rich defects as active sites and suppresses the shuttle effect of polysulfides produced in discharge/charge processes. Consequently, the CNT@ReS 2 @NC nanocables possess outstanding electrochemical performance in both PIBs and SIBs owing to the synergistic effect from the different components. A long cycling lifespan of 3500 cycles with a maintained discharge capacity of 125 mAh/g is achieved for CNT@ReS 2 @NC at 1 A/g in PIBs. In SIBs, it can keep a high capacity of 202 mAh/g over 3000 cycles at 5 A/g. Moreover, the CNT@ReS 2 @NC||Na 3 V 2 (PO 4 ) 3 full cell can exhibit remarkable cycling performance, yielding a low capacity decay rate of 0.019 % per cycle over 1000 cycles at 2C.
研究领域:
材料科学
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电化学
✓ 已验证
产品关联
DOI
PubMed
高影响因子
JOURNAL OF COLLOID AND INTERFACE SCIENCE
·
2024
·
IF 9.4
Yanduo Liu,Mengwei Li,Jianing Guo,Ge Jin,Yue Yin,Yu Cui,Tong Sun
Recently, there has been a significant increase in interest in using photocatalysis for the energy conversion of polluting gases. In this research, sodium and ruthenium bimetallic functional sites co-modified bismuth tungstate (Ru/Na-Bi 2 WO 6 ) nanoflower photocatalyst was synthesized via the hydrothermal method. The CO 2 reduction products on the Bi 2 WO 6 substrate were CO (1.66 μmol/g/h, 68 %) and CH 4 (0.78 μmol/g/h, 32 %). After optimization, a significant change in the CO 2 products of the Bi 2 WO 6 -based composite material was observed, with CO (0.61 μmol/g/h, 3.6 %) and CH 4 (16.1 μmol/g/h, 96.4 %). Results showed that the dominance of CH 4 as the main product in the Ru/Na-BWO system is attributed to the effective doping of Na, which generates impurity energy levels composed of oxygen vacancies, lowering the conduction band position of Bi 2 WO 6 , thereby suppressing CO generation, and enhancing CH 4 selectivity by changing the CO 2 activation pathway. The remarkable performance is ascribed to the synergized adsorption and activation of CO 2 by the tandem Na + sites and Ru 0 sites. Specifically, the doped Na + sites play a major role in promoting the adsorption CO 2 molecules, while the Ru 0 sites play a dominant role in facilitating the activation of the intermediates.
研究领域:
材料科学
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环境科学
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化学工程
✓ 已验证
产品关联
DOI
PubMed
高影响因子
Journal of Energy Chemistry
·
2024
·
IF 14
Haizhao Yang,Haifeng Lv,En Zhou,Xiaohao Ji,Chunnian Chen,Haolei Yu,Zhaowei Sun,Dawei Zhang,Hongchang Jin,Xianghua Kong,Hengxing Ji
Sodium metal batteries (SMBs) are rising as viable alternatives to lithium-ion systems due to their superior energy density and sodium's relative abundance. However, SMBs face significant impediments, particularly the exceedingly high negative-to-positive capacity ratios (N/P ratios) which severely encumber energy density and hinder their practical application. Herein, a novel nucleophilic Na 3 P interphase on aluminum foil has been designed to significantly lower the nucleation energy barrier for sodium atom deposition, resulting in a remarkable reduction of nucleation overpotential and efficient mitigation of dendritic growth at high sodium deposition of 5 mA h cm −2 . The interphase promotes stable cycling in anode-less SMB configurations with a low N/P ratio of 1.4 and high cathode mass loading of 11.5 mg cm −2 , and demonstrates a substantial increase in high capacity retention of 92.4% after 500 cycles even under 1 C rate condition. This innovation signifies a promising leap forward in the development of high-energy-density, anode-less SMBs, offering a potential solution to the longstanding issues of cycle stability and energy efficiency.
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 RADIOANALYTICAL AND NUCLEAR CHEMISTRY
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2026
·
IF 1.7
Li Shiyu,Fu Chengyun,Zhou Duo,Tian Qiang,Henderson Mark Julian,Zhu Shan,Yan Minhao
The adsorption of Sr 2+ and Cs + onto Gaomiaozi bentonite colloids (GMZC) was investigated to evaluate their role in radionuclide migration. The results show that within a concentration range of 20–100 mg·L⁻ 1 for Sr 2+ and Cs + , the distribution coefficient decreases with increasing ion concentration. The mechanistic study indicates that the adsorption of Sr 2+ is predominantly governed by surface complexation, whereas that of Cs + is mainly driven by ion exchange. Furthermore, Sr 2+ induces structural ordering of GMZC layers and promotes particle aggregation. However, in Na-Cl-SO 4 groundwater, the bentonite suspension showed poor stability and a significantly weakened adsorption capacity for both 90 Sr and 137 Cs, demonstrating the decisive impact of water chemistry on its barrier function.
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DOI
高影响因子
SENSORS AND ACTUATORS B-CHEMICAL
·
2024
·
IF 8
Xuan-Yu Yang,Hao-Nan Chen,Li-Juan Yue,Fei-Long Gong,Ke-Feng Xie,Shi-Zhong Wei,Yong-Hui Zhang
The design of novel functional nanostructures for advanced chemical engineering field is of great importance. In this work, Pd-modified Na-doped WO 3 nanorods are rationally designed for rapid and detection of hydrogen, which is a green and clean energy in modern industry. Notably, and H + as well as citrate ions play an important role in the formation of 1D nanorods, and the morphology formation mechanism is explored. Here, inspired by the novel Pd-modified Na-doped WO 3 nanorods structure, the Pd-400-Na/WO 3 NRs exhibit high sensing ability with ultra-high response to hydrogen (R a /R g = 218@25 ppm) and fast response time (3 s). The combination of experimental and theoretical results shows that Na doping effectively modulates the d-band center of Pd and enhances activation and desorption of H 2 on the Pd surface. The 1D porous structure also facilitates the diffusion of H 2 within the framework, and accelerate the charge transformation. Meanwhile, the surface Pd 0 sites are assigned as the surface active sites for H 2 adsorption and activation, and Pd 2+ sites facilitate the desorption process. Our work paves the new insights for the design of high performance H 2 sensing materials.
研究领域:
材料科学
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化学工程
·
纳米技术
✓ 已验证
DOI
高影响因子
CERAMICS INTERNATIONAL
·
2024
·
IF 5.1
Haotian Liu,Kui Liu,Da Huang,Qin Yu,Cheng Liu,Jie Li,Yulong Liao,Dainan Zhang,Huaiwu Zhang
Herein, the dielectric properties of Na + doped Li 10 ZnTi 13 O 32 ceramics were investigated by first-principles computational prediction and combined with the solid-phase reaction method. Li 9.88 Na 0.12 ZnTi 13 O 32 obtained the best dielectric properties by sintering at 1050 °C for 4 h: ε r = 30.01, Q × f = 90,879 GHz (@7.8 GHz), τ f = 3.93 ppm/°C. In terms of extrinsic factors, the optimization of the densification, the creation of the second phase TiO 2, and the increase of the grain size resulted in better dielectric properties. Intrinsic factors indicate that the weakening of the damping behavior and the increase in the electron cloud density lead to a decrease in the dielectric loss. The increase in ion polarisation and the blue shift of the Raman wavenumber lead to a gradual increase in ε r . The temperature stability is optimized depending on the TiO 2 content. The optimized Li 9.88 Na 0.12 ZnTi 13 O 32 ceramics have unlimited applications in microwave communications.
研究领域:
材料科学
·
物理学
✓ 已验证
DOI
高影响因子
Nature Communications
·
2024
·Vol. 15
·期 1
·1-12
·
IF 14.7
Feng Wenting,Wei Xinru,Yang Jianhang,Ma Chenyu,Sun Yiming,Han Junwei,Kong Debin,Zhi Linjie
Rechargeable sodium-chlorine (Na-Cl 2 ) batteries show high theoretical specific energy density and excellent adaptability for extreme environmental applications. However, the reported cycle life is mostly less than 500 cycles, and the understanding of battery failure mechanisms is quite limited. In this work, we demonstrate that the substantially increased voltage polarization plays a critical role in the battery failure. Typically, the passivation on the porous cathode caused by the deposition of insulated sodium chloride (NaCl) is a crucial factor, significantly influencing the three-phase chlorine (NaCl/Na + , Cl - /Cl 2 ) conversion kinetics. Here, a self-depassivation strategy enabled by iodine anion (I - )-tuned NaCl deposition was implemented to enhance the chlorine reversibility. The nucleation and growth of NaCl crystals are well balanced through strong coordination of the NaI deposition-dissolution process, achieving depassivation on the cathode and improving the reoxidation efficiency of solid NaCl. Consequently, the resultant Na-Cl 2 battery delivers a super-long cycle life up to 2000 cycles.
研究领域:
材料科学
·
电化学
✓ 已验证
DOI
高影响因子
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