Energy & Environmental Materials
·
2022
·Vol. 6
·期 3
·e12364
·
IF 13.443
Liang Lu,Chunwen Sun,Jian Hao,Zelin Wang,Sergio F. Mayer,Maria Teresa Fernández-Díaz,José Antonio Alonso,Bingsuo Zou
The recovery and utilization of carbon dioxide (CO 2 ) is the key to achieve the targets of peak carbon dioxide emissions and carbon neutrality. The Na-CO 2 battery made with cheap alkali metal sodium and greenhouse gas CO 2 is an effective strategy to consume CO 2 and store clean renewable energy. However, the liquid electrolyte volatilization in the open battery system and inevitable dendrite growth restrict the application of Na-CO 2 batteries. In this work, magnesium-doped Na 3 Zr 2 Si 2 PO 12 (NZSP) was studied as a solid electrolyte for solid-state Na-CO 2 batteries. The ionic conductivity of Na 3.2 Zr 1.9 Mg 0.1 Si 2 PO 12 reaches 1.16 mS cm −1 at room temperature by replacing Zr ions in Na 3 Zr 2 Si 2 PO 12 with Mg ions, and the structural changes are analyzed by neutron powder diffraction. The composite electrolyte consisting of highly conductive Na 3.2 Zr 1.9 Mg 0.1 Si 2 PO 12 and high processability poly(vinylidene fluoride-co-hexafluoropropylene) (PVDF-HFP) is utilized for the first time to assemble a solid-state Na-CO 2 battery. The cell shows a full discharge capacity of 7720 mAh g −1 at 200 mA g −1 . The middle gap voltage is lower than 2 V after 120 cycles at 200 mA g −1 and at a cut-off capacity of 500 mAh g −1 . This work demonstrates a promising strategy to design high-performance solid-state Na-CO 2 batteries.
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Journal of Energy Chemistry
·
2023
·
IF 13.1
Guoliang Liu,Weile Xu,Jianghua Wu,Yong Li,Liping Chen,Shuyue Li,Qinghui Ren,Juan Wang
O3-NaNi 1/3 Fe 1/3 Mn 1/3 O 2 is a promising layered cathode material with high specific capacity, low cost, and simple synthesis. However, sluggish kinetic hindrance is attributed to the size discrepancy between the large Na-ion and narrow tetrahedral interstitial positions, leading to inferior rate capacity and low reversible capacity. Herein, F − with light‐weight and strong electronegativity is introduced to substitute O atoms in the bulk structure, which intensifies the bond strength of transition metal and oxygen and enlarges the Na + diffusion channel. In addition, density-functional theory (DFT) calculations demonstrate that the electrostatic interaction is weakened between Na + in the tetrahedral site and the transition-metal cation directly below it, dramatically reducing the migration barriers of Na + diffusion. Consequently, the as-obtained NaNi 1/3 Fe 1/3 Mn 1/3 O 1.95 F 0.05 sample displays outstanding rate performance of 86.7 mA h g −1 at 10 C and excellent capacity retention of 84.1% after 100 cycles at 2 C. Moreover, a full cell configuration using a hard carbon anode reaches the energy density of 307.7 Wh kg −1 . This strategy paves the way for novel means of modulating the Na-ion migration path for high-rate O3-type layered cathode materials.
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高影响因子
Journal of Cleaner Production
·
2024
·
IF 9.7
Zhengshuai Sun,Rujiao Jiang,Wenbin Hua,Qi Wei,Qiaoxia Yuan,Baojun Yi
Biomass-based graphitic carbon is a promising material, but the effect mechanism of inherent alkali metals on the catalytic pyrolysis of biomass is still unclear. In this study, cellulose was selected as the model substance, and the influence mechanism of Na on the graphitization of cellulose catalytic pyrolysis was investigated through a combination of experiments and theoretical calculations. The results indicate that Na can interact with the carbon skeleton through van der Waals forces, thereby altering the spatial structure of graphite crystals and increasing the interlayer spacing of graphite by 27.7%. In addition, Na can coexist with Fe(III) in the form of oxides, while also increasing the reaction energy barrier of reverse hydroxylation and dehydration cyclization, decreasing the generation of reducing gases mainly composed of CO. This impedes the reduction of iron-based catalysts, thereby affecting the formation of the graphite microcrystalline structure. The research indicates that maintaining the ratio of Na content to iron-based catalysts within a 1:1 range is optimal for producing graphite carbon from cellulose.
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高影响因子
CHEMICAL ENGINEERING JOURNAL
·
2021
·
IF 13.273
Wei Zeng,Xiaojia Zhang,Chunyang Yang,Chengzhi Zhang,Huimin Shi,Jin Hu,Yanli Zhao,Wenjing Zhang,Guanhua Zhang,Huigao Duan
Alkali metal anodes are promising anodes for constructing novel battery systems with high energy density. Nevertheless, limited nucleation sites and nonuniform local electric field caused dendrites growth and unlimited volume expansion hindered their practical implementation during electrochemical plating/stripping. Herein, a 3D N-doped carbon nanofiber skeleton wrapped with Ni nanoparticles encapsulated carbon nanotubes (CNTs-Ni@NCFs) is prepared by hydrothermal process and followed catalytic reaction under ethanol atmosphere to construct a superior Li/Na-philic host with stable chemical properties. The 3D NCF networks serve as a primary framework, providing sufficient voids for alkali metal deposition and rapid electron and ion transport. The Li/Na-philic Ni nanoparticles and catalyzed CNTs on CFs provide evenly distributed nucleation sites and uniform local electric field, leading to dendrite-free Li deposition, which is confirmed by theoretical calculations. Because of the guided deposition behavior and bare volume change, the CNTs-Ni@NCFs anode delivers an extremely low nucleation overpotential in the initial deposition and a superior plating/stripping voltage hysteresis under a high current density of 30 mA cm −2 for 300 cycles. The CNTs-Ni@NCFs-Li full cell with LiFePO 4 cathodes demonstrates 94.2% capacity retention after 200 cycles under 2 C. When coupled with Na 3 V 2 (PO 4 ) 3 cathode, the CNTs-Ni@NCFs-Na cell shows a good suitability in full cell. This work shed new light on fabricating novel stable alkali metal anodes, which may also pave the way toward to other practical applications with high energy densities, such as in Li-air and Li-S batteries, etc .
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高影响因子
JOURNAL OF MATERIALS SCIENCE-MATERIALS IN ELECTRONICS
·
2021
·Vol. 32
·期 11
·14128-14136
·
IF 2.478
Song Fengmin,Zhang Gongguo
A series of double-perovskite orange–red-emitting Ca (3−2 x ) Sm x Na x TeO 6 ( x = 0.01–0.25) phosphors have been synthesized via high-temperature method. The single-phase and orthorhombic structure of Ca 3 TeO 6 :Sm 3+ , Na + phosphors was confirmed by X-ray powder diffraction. Under 405 nm excitation, Ca 3 TeO 6 :Sm 3+ , Na + phosphors emitted a series of orange–red emission due to the transition of Sm 3+ from 4 G 5/2 to 6 H J/2 ( J = 5, 7, 9, and 11). The optimal Sm 3+ -doping concentration of Ca (3−2 x ) Sm x Na x TeO 6 ( x = 0.01–0.25) was x = 0.10. The thermal-quenching temperature of Ca 3 TeO 6 :0.10Sm 3+ , 0.10Na + phosphor was above 480 K. A white light-emitting diode (w-LED) based on 410 nm UV chip was successfully fabricated, and it presented a good correlated color temperature and a high color-rendering index (R a ). Therefore, orange–red-emitting Ca 3 TeO 6 :Sm 3+ , Na + phosphors have potential applications in UV-based w-LEDs.
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Nano Materials Science
·
2019
·
IF 0
Pin Song,Jun Di,Lixing Kang,Manzhang Xu,Bijun Tang,Jun Xiong,Jiewu Cui,Qingsheng Zeng,Jiadong Zhou,Yongmin He,Qundong Fu,Juan Peng,Shasha Guo,Bo Lin,Jingyu Zhang,Peng Meng,Zheng Liu
Room temperature Na-ion batteries (SIBs) show great potential for use as renewable energy storage systems. However, the large-scale application of SIBs has been hindered by the lack of an ideal SIBs anode material. We synthesized MoS 2 on carbonized graphene-chitosan (G-C) using the hydrothermal method. The strong interaction between the MoS 2 and the G-C greatly improved the electron transport rate and maintained the structural stability of the electrode, which lead to both an excellent rate capability and long cycle stability. The G-C monolith was proven to enhance the electrical conductivity of the composites and served as a matrix for uniformly dispersing active MoS 2 nanosheets (NSs), as well as being a buffer material to adapt to changes in volume during the cycle. Serving as an anode material for SIBs, the MoS 2 -G-C electrode showed good cycling stability (527.3 mAh g −1 at 100 mA g −1 after 200 cycles), excellent rate capability, and a long cycle life (439.1 mAh g −1 at 1A g −1 after 200 cycles).
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Nanoscale
·
2019
·Vol. 11
·期 12
·5285-5294
·
IF 6.97
Yunzhao Liu,Xiaowei Chi,Qi Han,Yuexiu Du,Jiaqi Huang,Xinghao Lin,Yu Liu
The Na–O2 battery system is attracting increasing attention due to its superiority in specific capacity and cost. However, its practical implementation is hindered by many issues, such as high charge–discharge overpotential, limited cycling life, and poor reversibility, all of which result from the mediocre O2 electrode. Herein, to surmount these critical challenges, hierarchical Co3O4@MnCo2O4.5 nanocubes (h-Co3O4@MnCo2O4.5 Ns) with a yolk–shell structure are designed for the first time as the novel O2 electrode. h-Co3O4@MnCo2O4.5 Ns are synthesized from a metal–organic framework via a template-assisted method, which is demonstrated to be helpful in creating a high specific surface area of 130.4 m2 g−1, a hierarchical macro- and mesoporous structure, and synergistic yolk-shelled Co3O4@MnCo2O4.5 active sites. These unique structural properties endow h-Co3O4@MnCo2O4.5 Ns with remarkably enhanced electrocatalytic activity towards both the ORR and OER. The Na–O2 battery based on h-Co3O4@MnCo2O4.5 Ns displays an ultrahigh initial discharge capacity of 8400 mA h g−1, ultralow charge–discharge overpotential of 0.45 V, long cycling life of 135 cycles, and excellent rate capability.
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PubMed
高影响因子
JOURNAL OF POWER SOURCES
·
2019
·
IF 7.467
Tongtong Yao,Nianjun Hou,Juanjuan Gan,Jun Wang,Xiaojing Zhi,Lijun Fan,Tian Gan,Yicheng Zhao,Yongdan Li
Sr 2-x Na x FeMo 0.65 Ni 0.35 O 6-δ is synthesized as an anode material for solid oxide fuel cells. The effects of Na on the crystalline phase and electrical properties are investigated. The main perovskite phase changes into a Ruddlesden-Popper structure after reduction when x is less than 0.1, while the material with a higher amount of Na keeps the perovskite structure. FeNi x alloy nanoparticles are exsolved during reduction, in which the content of Ni increases with the rise of Na amount. The surface oxygen vacancy concentration is also influenced by the doping of Na, and the highest value is reached when x is 0.1. Sr 1.9 Na 0.1 FeMo 0.65 Ni 0.35 O 6-δ anode exhibits the highest activity, and a single cell supported by a 300-μm-thick La 0.8 Sr 0.2 Ga 0.8 Mg 0.2 O 3-δ electrolyte layer shows maximum power densities of 1495 and 627 mW cm −2 at 850 °C with H 2 and wet CH 4 as fuels, respectively. The coking resistance of the anode is also improved with Na doping.
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高影响因子
Nano Energy
·
2019
·
IF 15.548
Sheng Huang,Chao Meng,Min Xiao,Shan Ren,Shuanjin Wang,Dongmei Han,Luyi Sun,Yuezhong Meng
Pseudocapacitive Na + storage based on the fast absorption/desorption kinetics is a new alternative to realize the high rate capability, which rely on increasing the surface area and creating surface vacancies. This means low Na + capacity because of low dielectric constant for the reported pseudocapacitive Na + storage materials. According to the capacitance formula, we find increasing the dielectric constant is a new path to improve the Na + capacity. This dielectricity (other than surface engineering) based pseudocapacitance can be called more real pseudocapacitance. The superparaelectric 2-dimensional (2D) Sn 2 P 2 S 6 has much higher dielectric constant than the bulk counterpart. The identical polaron direction triggered superparaelectricity and high dielectric constant of 2D Sn 2 P 2 S 6 are well verified. And 2D assembly between the 2D Sn 2 P 2 S 6 and graphene construct the compact network for conductivity of electron and Na + . As results, the 2D Sn 2 P 2 S 6 battery based on more real pseudocapacitance delivers alloy-like capacity and long cycle stability.
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Advanced Energy Materials
·
2018
·Vol. 8
·期 36
·1802176
·
IF 21.875
Xiaoyu Jiang,Xingwei Liu,Ziqi Zeng,Lifen Xiao,Xinping Ai,Hanxi Yang,Yuliang Cao
Dual-carbon batteries provide a new perspective on energy storage technology due to their high voltage and low cost. Herein, a novel Na + -based dual-carbon battery (Na + -DCB) is developed based on a nonflammable trimethyl phosphate (TMP) electrolyte with sodium bis(trifluoromethanesulfonate)imide salt (NaTFSI). As the molar ratio of NaTFSI/TMP increases to 1:2, the graphite cathode shows a high reversible capacity of 52.9 mAh g −1 , excellent rate capability (21.0 mAh g −1 at 2000 mA g −1 ) and superstability cycling performance (≈100% capacity retention after 750 cycles). In addition, a stable solid electrolyte interface (SEI) film is formed on the surface of hard carbon anode by the preferential reductive decomposition of TFSI − , which suppresses decomposition of TMP. In this case, the Na + -DCB is capable to provide an operation voltage of 4.0 V and excellent electrochemical performance. This work provides new insights for developing new dual-carbon batteries with safety, low cost, and absence of heavy metals.
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高影响因子
CHEMICAL ENGINEERING JOURNAL
·
2019
·
IF 8.355
Wenyan Du,Yuanke Wu,Tingting Yang,Bingshu Guo,Dingyu Liu,Shu-Juan Bao,Maowen Xu
Developing high energy density room-temperature sodium sulfur (RT Na-S) batteries relies on the design of delicate structure that can be efficiently injected sulfur and enhance the cycle life of electrode active material. Herein, a three dimensional (3D) hierarchical cathode substrate with VO 2 nanoflowers as catalyst in situ grown on reduced graphene oxide (rGO) for sulfur cathodes are designed and prepared. In this novel structure, the electronic conductivity of sulfur cathode can be greatly improved due to the high electrical conductivity of rGO substrate. More importantly, the catalytic effect of VO 2 accelerates the conversion long-chain NaPSs to Na 2 S 2 /Na 2 S, and enhances the cycle capability, which can be validated by experimental data. As a result, the as-obtained rGO/VO 2 /S composites achieves an initial reversible capacity of 876.4 mA h g −1 at 0.2C. Moreover, the capacity of 156.1 mA h g −1 is demonstrated after long-cycling term of 1000 cycles at 2C and high cycle stability of only 0.07% capacity decay per cycle is exhibited.
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高影响因子
JOURNAL OF CHEMICAL THERMODYNAMICS
·
2014
·
IF 2.423
Pan Liang,Qiu-Yue Kang,Lu Du,Zhi-Hong Liu
Two pure microporous materials, Rb[ZnBP 2 O 8 ] and Cs[ZnBP 2 O 8 ], have been synthesized and characterized by XRD, FT-IR, DTA-TG techniques and chemical analysis. The molar enthalpies of solution of Rb[ZnBP 2 O 8 ] and Cs[ZnBP 2 O 8 ] (s) in 3 mol · dm −3 HCl (aq), of Zn(PO 3 ) 2 (s) in (HCl + H 3 BO 3 ) (aq), and of RbCl (s)/CsCl (s) in [Zn(PO 3 ) 2 + HCl + H 3 BO 3 ] (aq) were measured by microcalorimeter at T = 298.15 K, respectively. With the incorporation of the previously determined enthalpy of solution of H 3 BO 3 (s) in 3 mol · dm −3 HCl (aq), together with the use of the standard molar enthalpies of formation for Zn(PO 3 ) 2 (s), RbCl (s)/CsCl (s), H 3 BO 3 (s), HCl (aq) and H 2 O (l), the standard molar enthalpies of formation of −(3198.5 ± 1.2) kJ · mol −1 for Rb[ZnBP 2 O 8 ] and −(3212.7 ± 1.2) kJ · mol −1 for Cs[ZnBP 2 O 8 ] at T = 298.15 K were obtained on the basis of the appropriate thermochemical cycle. In addition, the molar enthalpy of formation of −(2944.4 ± 1.2) kJ · mol −1 for [ZnBP 2 O 8 ] − has also been estimated by a group contribution method, which can be used to predict the Δ f H m θ of the other similar borophosphates. Moreover, these data have been further used to compare the thermodynamic stability of this series of borophosphates.
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