ACS Applied Materials & Interfaces
·
2024
·
IF 8.3
Tao Sun,Shuo Wang,Mengyao Xu,Ning Qiao,Qizhen Zhu,Bin Xu
Sulfurized polyacrylonitrile (PAN@S) is a promising cathode material for room-temperature Na/S batteries but suffers from low conductivity and insufficient electrochemical activity, resulting in unsatisfactory actual capacity and rate performance. Herein, Ti3C2Tx MXene nanosheets are used as a conductive and catalytic binder to establish the PAN@S electrode, wherein MXene constructs a highly conductive framework for fast charge transport and provides high catalytic effect to improve the active material utilization and accelerate the redox kinetics significantly. Therefore, the PAN@S electrode bonded by MXene shows an electronic conductivity of 5.05 S cm–1, 4 orders of magnitude higher than the conventional electrodes bonded by the insulative polymer binders, and much decreased activation energy barrier and resistance. Consequently, the PAN@S electrode displays superior performance in terms of high capacity (697.3 mAh g–1 at 200 mA g–1), unparalleled rate capability (189.0 mAh g–1 at 20 A g–1), and excellent high-rate cycling performance (a capacity decay rate of ∼0.04% per cycle during 1000 cycles at 5 A g–1). This work provides a high-performance electrode for room-temperature Na/S batteries and shows the promising potential of conductive and catalytic MXene binders in boosting the performance of active materials.
研究领域:
储能
·
材料科学
·
电化学
·
电池技术
✓ 已验证
DOI
高影响因子
JOURNAL OF ELECTROANALYTICAL CHEMISTRY
·
2024
·
IF 4.1
Zhilong Wang,Chao Zhang,Zhongcheng Li,Zeyu Teng,Yu Wang,Kanghua Chen,Changjun Zhu
The uncontrolled growth of lithium dendrites and unstable solid-electrolyte interface (SEI) film limit the practical application of lithium metal anodes. In this study, we report a synergistic strategy utilizing a Li-Na alloy and fluoroethylene carbonate (FEC) for the in-situ construction of LiF/NaF-rich hybrid SEI film. This approach inhibits the growth of lithium dendrites and mitigates the volume expansion of lithium metal anodes during repeated plating/stripping. The results indicate that Na + is precipitated from the Li-Na alloy anodes during cycling, with Na + preferentially depositing on the surface of active Li crystals. Meanwhile, Li + is forced to deposit in the inactive regions around Na, thereby inhibiting the growth of lithium dendrites. The LiF/NaF-rich hybrid SEI film, which process high ionic conductivity and mechanical strength, form on the surface of Li-Na alloy anodes, alleviating the volume expansion of lithium metal anodes. When the molar ratio of Li/Na is 16, the Li-Na alloy exhibits excellent cycling stability and low overpotential. The Li-Na alloy||Sulfurized polyacrylonitrile (SPAN) full cell demonstrates a high reversible capacity of 630 mAh g −1 at 1000 mA g −1 , with 70 % capacity retention after 300 cycles, significantly higher than Li||SPAN (48 %). This strategy presents a potential solution for the practical application of long-life and high energy density lithium-sulfur batteries.
研究领域:
材料科学
·
电化学
·
储能技术
·
电池技术
✓ 已验证
DOI
高影响因子
INORGANIC CHEMISTRY
·
2023
·
IF 4.6
Peng-Fei Chen,Chun-Li Hu,Ming-Yang Cao,Xue-Ying Zhang,Jiang-Gao Mao
The first carbonatotellurites, AKTeO2(CO3) (A = Li, Na), have been successfully synthesized by using boric acid as the mineralizer. AKTeO2(CO3) (A = Li, Na) crystallize in the monoclinic space group P21/n (no. 14), and their structures exhibit the novel zero-dimensional (0D) [Te2C2O10]4– clusters, in which two [TeO4]4– groups form a [Te2O6]4– dimer via edge-sharing, with each side of the dimer attached by a [CO3]2– group via a Te–O–C bridge. The alkali metal cations occupy the voids between the 0D clusters and maintain the charge balance. The ultraviolet–visible–near-infrared diffuse reflectance spectra show that the short absorption cut-off edges of LiKTeO2(CO3) (LKTC) and NaKTeO2(CO3) (NKTC) are 248 and 240 nm, respectively, and LKTC exhibits the largest experimental band gap (4.58 eV) among all of the tellurites containing the π-conjugated anionic groups reported. Theoretical calculations revealed that they exhibit moderate birefringences of 0.029 and 0.040@1064 nm, respectively.
研究领域:
无机化学
·
材料科学
·
固态化学
·
光学材料
✓ 已验证
DOI
高影响因子
SOLAR ENERGY
·
2019
·
IF 4.674
Xin-Shou Wang,Qing-Miao Fan,Qing-Wen Tian,Zheng-Ji Zhou,Dong-Xing Kou,Wen-Hui Zhou,Qing-Bo Meng,Zhi Zheng,Si-Xin Wu
Cu(In,Ga)Se 2 (CIGSe) based solar cells have received considerable interests because they have reached the commercialization stage. High efficiency CIGSe based solar cells are often fabricated via post deposition treatment (PDT) with alkali metal element incorporation. In this work, we present an effective and low-cost way of Na-incorporation for photoelectric conversion efficiencies (PCE) promotion of CIGSe solar cells. Soda-lime glass (SLG) was used as both substrate and cover during the PDT procedure for Na doping. The effects of different substrate and cover on the grain size and phase composition of CIGSe films were studied in detail. The Na- incorporation from SLG significantly improved the grain growth, charge carrier density and V oc of CIGSe solar cells. At last, a best 11.53% PCE CIGSe solar cell was achieved at optimal condition.
研究领域:
光伏技术
·
材料科学
·
半导体器件
✓ 已验证
DOI
高影响因子
Energy Storage Materials
·
2019
·
IF 0
Chenxiao Chu,Nana Wang,Lili Li,Liangdong Lin,Fang Tian,Yanlu Li,Jian Yang,Shi-xue Dou,Yitai Qian
The Na metal anode has long been considered as one of the most promising anode types due to its high theoretical capacity and its having the lowest electrochemical potential. Safety concerns, low efficiency, and large volume changes are severe hurdles blocking its practical application, however, especially in the case of high areal capacity. Herein, an oxygen-doped carbon nanotube framework (a-CNTs) obtained after acidification has been adopted as the Na plating matrix to regulate the homogeneous nucleation of Na metal and suppress dendrite growth. The oxygenic functional groups on the carbon nanotubes induce them “sodiophilic”, which guides the homogeneous nucleation and uniform deposition of Na. In addition, the cross-conductive network and high specific surface area of a-CNTs further enhance the electrochemical performances. As a result, a-CNTs have enabled reversible plating/stripping for 1000 cycles with coulombic efficiency of 99.8% at 3 mA cm −2 for 1 mA h cm −2 . Furthermore, the symmetrical cells could run stably for 1650 cycles at 3 mA cm −2 for 1 mA h cm −2 , and even could run for more than 300 h at 5 mA cm −2 at 8 mA h cm −2 , which has rarely been achieved under such aggressive working conditions.
研究领域:
材料科学
·
电化学
·
能源存储
·
纳米技术
·
固体离子学
✓ 已验证
DOI
ADVANCED FUNCTIONAL MATERIALS
·
2026
·
IF 19.9
Feiyang Yan,Huan Liu,Jing Wan,Xueping Sun,Jiahuan Luo,Yan Wang,Shixiong Sun,Junwei Lang
Sodium metal batteries (SMBs) are regarded as promising candidates for next-generation energy storage technologies due to their high energy density and low cost yet remain challenging owing to dendritic sodium deposition, unstable electrode–electrolyte interfaces, and sluggish ion transport, particularly under fast-charging conditions or at low operating temperatures. To address these challenges, in this study, we introduce Sn-Zn atomic configured porous, nitrogen-rich carbon-based meta-material (SA-NCS), derived from a guanine-based hydrogen-bonded organic framework (HOF), serving as sodium host material for SMBs, which provides a high density of atomic sodiophilic sites to promote the transition from one-dimensional dendritic deposition to two-dimensional planar-oriented dense plating, and features programmable nano-to-macro functional structures capable of effectively accommodating the anodic volume fluctuation induced by sodium plating and stripping. SA-NCS@Cu current collector exhibits an ultralow nucleation overpotential of 22 mV even at a high current density of 20 mA cm −2 and delivers exceptional cycling stability, enabling stable operation for 2000 h at 10 mA cm −2 with Coulombic efficiencies exceeding 99.9%. Moreover, the SA-NCS @Cu current collector based anode-less sodium metal batteries demonstrate a superior fast-charging capability and long-term cycling stability at −20°C. This study presents a practical design for sodium hosts, enabling high-performance SMBs.
✓ 已验证
DOI
高影响因子
ACS Applied Materials & Interfaces
·
2020
·
IF 8.758
Yansong Bai,Xiaoyan Zhang,Hongbo Shu,Zhigao Luo,Hai Hu,Qinglan Zhao,Ying Wang,Xianyou Wang
The poor electronic conductivity of Na2FeSiO4 always limits its electrochemical reactivities and no effective solution has been found to date. Herein, the novel Ni-substituted Na2Fe1–xNixSiO4@C nanospheres (50–100 nm) encapsulated with a 3D hierarchical porous skeleton (named as alveolation-like configuration) constructed using in situ carbon are first synthesized via a facile sol–gel method, and the effects of Ni substitution combined with the design of a unique carbon network on Na-storage properties are assessed systematically, focusing on alleviating the inherent defects of the Na2FeSiO4 cathode material. A series of characterization technologies such as X-ray diffraction, transmission electron microscopy, X-ray photoelectron spectroscopy and so forth, coupled with the electrochemical measurements and first-principles calculations, are used to explore the structure, morphology and electrochemical behaviors of the as-prepared materials. The results show that the synergism between Ni substitution and the special alveolation-like configuration enables fast Na ions mobility (from 10–14 to 10–12 cm2 s–1), reduces band gap energy (from 2.82 to 1.79 eV) and lowers Na-ion diffusion barriers, finally reciprocating the vigorous electrochemical kinetics of the electrode. Especially, the elaborately designed material—Na2Fe0.97Ni0.03SiO4@C—displays superior Na-storage properties of around 197.51 mA h g–1 (corresponding to 1.43 Na+ intercalation) at 0.1 C within 1.5–4.5 V along with desirable capacity retention (84.44% after 100 cycles), and the rate capability is also markedly enhanced (a capacity of 133.62 mA h g–1 at 2 C). Such the effective methodology employed in this work opens a potential pathway to synthesize the silicate cathode material with excellent electrochemical properties.
研究领域:
材料科学
·
电化学
·
能源存储
·
纳米材料
·
固态化学
✓ 已验证
DOI
高影响因子
Energy Technology
·
2019
·Vol. 8
·期 3
·1901105
·
IF 3.163
Honglin Yan,Qiang Ru,Ping Gao,Shikun Cheng,Fuming Chen,Francis Chi-Chung Ling,Li Wei
Lamellar V 5 O 12 ·6H 2 O nanobelts coupled with inert Zn(OH) 2 ·0.5H 2 O are in situ fabricated via a facile hydrothermal strategy. Herein, the inert Zn(OH) 2 ·0.5H 2 O phase acts as a buffer matrix to strengthen the structural stability of V 5 O 12 ·6H 2 O host material, relieving the severe volume variation. Therefore, benefiting from the large interplanar spacing of active V 5 O 12 ·6H 2 O and volume buffering effect of inert Zn(OH) 2 ·0.5H 2 O, V 5 O 12 ·6H 2 O/Zn(OH) 2 ·0.5H 2 O hybrid (denoted as Z-V 5 O 12 ·6H 2 O) sustainably endures the repetitive Zn 2+ /Na + insertion/extraction and boosts the electrochemical properties. As cathodes for aqueous zinc-ion batteries, the Z-V 5 O 12 ·6H 2 O hybrid shows a high discharge capacity of 328 mAh g −1 at 50 mA g −1 and keeps 146 mAh g −1 at 1 A g −1 after 1000 cycles. For nonaqueous sodium-ion batteries, the hybrid also furnishes a high initial discharge capacity of 241 mAh g −1 at a current density of 50 mA g −1 and maintains 97 mAh g −1 at 100 mA g −1 after 100 cycles.
研究领域:
材料科学
·
电化学
✓ 已验证
DOI
高影响因子
HYDROMETALLURGY
·
2026
·
IF 6.3
Shuang Sun,Yuefeng Deng,Ji Chen,Yang Meng,Rui Qin,Zhongte Du
Lithium recovery from weakly acidic raffinate of spent LIBs by P507 was studied. • A cascade extraction process was designed for the separation of Li + /Na + . • P507 could extract 99.9% of Li + in the feed at the lower equilibrium pH of 5.96. • The stripping liquor comprising 22.2 g/L Li + and 0.11 g/L Na + was obtained. • The kinetic of Li + extraction was discussed and the control mechanism was revealed. The booming growth of electric vehicle industry contributes to sizable end-of-life lithium-ion batteries (LIBs). It is crucial to recover Li + from the high Na/Li ratio raffinate of spent LIBs for circular economy and sustainable resources. In this paper, the Li + extraction process from weakly acidic raffinate of spent LIBs by 2-ethylhexyl phosphonic acid mono-2-ethylhexyl ester (P507) system was investigated. Compared with di-2-ethylhexyl phosphoric acid (P204), P507 showed better separation selectivity for Li + /Na + . The extraction parameters of saponification degree, modifying agents, phase ratio, extraction time, and loading capacity were optimized. A cascade extraction process with ten-stage extraction and eight-stage scrubbing was designed for separating Li + /Na + . It could be concluded that P507 could extract 99.9% of Li + from the feed at an equilibrium pH of 5.96, and the loaded organic phase comprising 2.55 g/L Li + and 0.02 g/L Na + was obtained. Moreover, a three-stage countercurrent stripping process was conducted with 1.75 mol/L H 2 SO 4 at an O/A ratio of 9:1. The final stripping liquor contained 22.2 g/L Li + and 0.11 g/L Na + , and a high-purity (99.5%) Li 2 CO 3 product was obtained by precipitation. Eventually, the kinetic study of Li + extraction with saponified P507 was discussed via the constant interfacial area cell method. The control mechanism was a mixing control occurring at the two-phase interface. The initial extraction rate equation of Li + could be expressed as R Li, init = 10 –6.15 [Li + ] 0.65 [NaA] 0.95 . This research provided a novel insight into the efficient separation of Li + /Na + under weakly acidic conditions, which would benefit the potential industrial applications and environmental protection.
✓ 已验证
DOI
高影响因子
CERAMICS INTERNATIONAL
·
2023
·
IF 5.2
Yixuan Zhao,Lu Liu,Li Zhou,Ruiqi Yang,Changlin Li,Jiexin Chen,Ziyue Hu,Haoran Su,Bin Deng,Xiaohui Ji,Ruijin Yu
New Sm 3+ doped Cd 2 MgTeO 6 tellurate red-emitting phosphors with Na + ions as charge compensation were obtained using a high-temperature solid-state approach at 1000 °C. During this study, the prepared phosphors were subjected to phase purity, particle morphology , luminescence characteristics, thermal stability, and Commission Internationale de L′ Eclairage (CIE) chromaticity. The critical quenching concentration of Sm 3+ doped Cd 2 MgTeO 6 phosphor was 2 mol%. According to Dexter's theory and the calculated R c value (22.21 Å), the dipole-dipole interaction causes the phenomenon of concentration quenching. Particularly, the Cd 2 MgTeO 6 :2 mol%Sm 3+ , 2 mol%Na + phosphor exhibited an evident red-light emission (647 nm) at λ ex = 407 nm because of the 4 G 5/2 to 6 H 9/2 level transition of Sm 3+ . Its internal quantum efficiency (IQE) was 38.87%. It is worth noting that the Cd 2 MgTeO 6 :Sm 3+ , Na + phosphor exhibited abnormal thermal quenching (ATQ) characteristics, and the luminous intensity of the Cd 2 MgTeO 6 :2 mol%Sm 3+ , 2 mol%Na + increased by 7.20% at 480 K compared with the initial temperature. In addition, white LEDs and red LEDs were successfully manufactured with a 408 nm chip. The prepared red LED showed the emission spectrum similar to the absorption spectrum of Phytochrome P r , which is expected to be applied in plant growth. The w-LED had a CCT (correlated color temperature) of 4790 K, color rendering index of 91, and color coordinates of (0.348, 0.335). Therefore, the Cd 2 MgTeO 6 :Sm 3+ , Na + phosphor has demonstrated potential applications in w-LEDs and plant growth LEDs.
✓ 已验证
产品关联
DOI
高影响因子
ENVIRONMENTAL SCIENCE & TECHNOLOGY
·
2023
·
IF 11.4
Xin He,Wutong Chen,Feiyun Sun,Zekai Jiang,Bing Li,Xiao-yan Li,Lin Lin
Flow-electrode capacitive deionization (FCDI) is a promising electromembrane technology for wastewater treatment and materials recovery. In this study, we used low-cost Na-modified zeolite (Na-zeolite) to prepare a composite flow-electrode (FE) suspension with a small amount of highly conductive carbon black (CB) to remove and recover NH4+ from synthetic and actual wastewater (200 mg-N/L). Compared with conventional activated carbon (AC), the Na-zeolite electrode exhibited a 56.2–88.5% decrease in liquid-phase NH4+ concentration in the FE suspension due to its higher NH4+ adsorption capacity (6.0 vs. 0.2 mg-N/g). The resulting enhancement of NH4+ diffusion to the electrode chamber contributed to the improved performance of FCDI under both constant current (CC) and constant voltage (CV) conditions. The addition of CB to the FE suspension increased the conductivity and facilitated Na-zeolite charging for NH4+ electrosorption, especially in CV mode. NH4+-rich zeolite can be easily separated by sedimentation from CB in the FE suspension, producing a soil conditioner with a high N-fertilizer content suitable for soil improvement and agricultural applications. Overall, our study demonstrates that the novel Na-zeolite-based FCDI can be developed as an effective wastewater treatment technology for both NH4+ removal and recovery as a valuable fertilizer resource.
✓ 已验证
产品关联
DOI
PubMed
高影响因子
Advanced Science
·
2023
·
IF 15.1
Quanzhen Sun,Chen Shi,Weihao Xie,Yifan Li,Caixia Zhang,Jionghua Wu,Qiao Zheng,Hui Deng,Shuying Cheng
Ion doping is an effective strategy for achieving high-performance flexible Cu 2 ZnSn(S,Se) 4 (CZTSSe) solar cells by defect regulations. Here, a Li&Na co-doped strategy is applied to synergistically regulate defects in CZTSSe bulks. The quality absorbers with the uniformly distributed Li and Na elements are obtained using the solution method, where the acetates (LiAc and NaAc) are as additives. The concentration of the harmful Cu Zn anti-site defects is decreased by 8.13% after Li incorporation, and that of the benign Na Zn defects is increased by 36.91% after Na incorporation. Synergistic Li&Na co-doping enhances the carrier concentration and reduces the interfacial defects concentration by one order of magnitude. As a result, the flexible CZTSSe solar cell achieves a power conversion efficiency ( PCE ) of 10.53% with certified 10.12%. Because of the high PCE and the homogeneous property, the Li&Na co-doped device is fabricated to a large area (2.38 cm 2 ) and obtains 9.41% PCE . The co-doping investigation to synergistically regulate defects provides a new perspective for efficient flexible CZTSSe solar cells.
✓ 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）