Journal of Physical Chemistry C
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2018
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IF 4.484
Shiying Guo,Xuemin Hu,Wenhan Zhou,Xuhai Liu,Yujie Gao,Shengli Zhang,Kan Zhang,Zhen Zhu,Haibo Zeng
Group-VA crystals have higher theoretical energy capacities than graphite as anode materials for Li/Na ion batteries. However, their bulks suffer from severe volume expansion and structural breakdown during lithiation or sodiation process, leading to abrupt drop of battery cycle performance. Our experimental and computational results reveal that two-dimensional (2D) group-VA crystals can preserve layered configuration without obvious structure damage. Here, we investigate the mechanism of 2D P, As, and Sb high-capacity anodes for fast-charging Li/Na ion batteries by calculated binding and diffusion properties of Li/Na on group-VA monolayers. Promisingly, group-VA monolayers can give rise to greater charge/discharge capability than their corresponding parent bulk materials. This is mainly because these 2D group-VA materials with c axis free expansion hold appropriate interaction with Li/Na atoms and enjoy especially lower energy barriers than their bulks. The energy barriers calculations of monolayers under mechanical stretching indicate that the structural roughness also plays a role in hard ion mobility in bulk structure besides space constraint. We also evaluate the performance of group-VA monolayers by calculating their density of states and open circuit voltages. These results provide conclusive evidence showing that 2D group-VA materials are promising anodes for Li/Na ion batteries.
研究领域:
材料科学
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能源存储
✓ 已验证
DOI
高影响因子
CERAMICS INTERNATIONAL
·
2018
·
IF 3.057
Bin Xiao,Bao Zhang,Lin-bo Tang,Chang-sheng An,Zhen-jiang He,Hui Tong,Wan-jing Yu,Jun-chao Zheng
V 2 O 3 is a promising anode material and has attracted the interests of researchers because of its high theoretical capacity of 1070 mAh g −1 , low discharge potential, inexpensiveness, abundant sources, and environmental friendliness. However, the development and application of V 2 O 3 have been hindered by the low conductivity and drastic volume change of V 2 O 3 composites. In this work, V 2 O 3 /reduced graphene oxide (rGO) nanocomposites are successfully prepared through a facile solvothermal method and annealing process. In this synthesis protocol, V 2 O 3 nanoparticles (NPs) are encapsulated by rGO. This unique structure enables rGO to inhibit volume changes and improve the ion and electronic conductivity of V 2 O 3 . In addition, V 2 O 3 NPs, which exhibit sizes of 5–40 nm, are uniformly dispersed on rGO sheets without aggregation. The Li + storage behavior of V 2 O 3 /rGO is systematically investigated in the potential range 0.01–3.0 V. The V 2 O 3 /rGO nanocomposite can achieve a high reversible specific capacity of 823.4 mAh g −1 under the current density of 0.1 A g −1 , and 407.3 mAh g −1 under the high current density of 4.0 A g −1 . The results of this study provide insight into the fabrication of rGO-based functional materials with extensive applications.
研究领域:
材料科学
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能源存储
✓ 已验证
产品关联
DOI
高影响因子
CHEMICAL ENGINEERING JOURNAL
·
2025
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IF 13.2
Yuying Zhao,Fengming Zhou,Qiuyue Liang,Bo Zhang,Peng Wang,Qingliang Lv,Caixia Li,Zhenyu Xiao,Lei Wang
Although the intrinsic layer structure of layered double hydroxide (LDH) is beneficial for more accessible active centers and faster electrolyte ions diffusion rate than closed-packed atom arrangement for achieving higher capacitance, the narrow interlaminar spacing results in inevitable “death volume” during the rapid charging-discharging process. Herein, an electrochemical assistant MOF etching strategy is developed to construct hierarchical porous LDH with pre-embed OH − ions and filled H 2 O molecule in inter-layer space (E-MOF-0.5 V) for unsealing theoretical capacity. According to the valence equilibrium theory, the increased valence of the metal center during electrochemical polarization can accelerate the filling of OH − ions and H 2 O molecules in the LDH inter-layer space. The involved OH − and water molecules can achieve rapid mass transfer processes through ‘‘Newton’s Cradle’’ and the rich pore and ultra-thin layer structure may make sure the active centers are almost completely accessible. Therefore, the optimized E-MOF-0.5 V delivers an outstanding specific capacity of 8547.2 mF cm −2 (2670.9 F g −1 ) at 4 mA cm −2 and maintains an excellent cycling performance of 88 % after 7200 cycles at 20 mA cm −2 . Besides, an E-MOF-0.5 V//rGO-Zn hybrid supercapacitor device is assembled, which presents an energy density of 7.97 mWh cm −2 and a power density of 6.63 mW cm −2 .
研究领域:
材料科学
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电化学
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纳米结构
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储能
✓ 已验证
产品关联
DOI
高影响因子
MATERIALS RESEARCH BULLETIN
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2025
·
IF 5.7
Litao Han,Hong Liu,Chen Lu,Yuanzhi Wei,Fanjun Kong
Molybdenum trioxide (MoO 3 ) possesses unique layered structure with high theoretical capacity and good environmental friendliness, which has been widely investigated as a potential anode material. Herein, MoO 3 nanosheets anchored in N-doped reduced graphene oxide (MoO 3 /NG) composite was constructed and prepared through hydrothermal reaction and post-calcination. The introduction of NG matrix can enhance the electronic conductivity and accelerate reaction kinetics of the MoO 3 , and solve the problem of severe capacity decay caused by its volume changes. MoO 3 /NG composite can deliver superior cycling performance (900.2 mAh g −1 at 0.2 Ag −1 after 100 cycles and 407.5 mAh g −1 at 10.0 Ag −1 after 500 cycles) and fast reaction kinetics with high diffusion coefficients and low charge transfer resistances. Moreover, the excellent electrochemical performance of the full battery lays a solid foundation for subsequent commercial application research.
研究领域:
材料科学
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纳米技术
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电化学
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储能
✓ 已验证
产品关联
DOI
高影响因子
Advanced Sustainable Systems
·
2021
·Vol. 6
·期 3
·2100420
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IF 6.271
Yuanlin Huang,Lei Fang,Yu Gu,Pingshi Wang,Hao Yan,Yanjie Wang,Zexing Cao,Zhaowu Tian,Bingwei Mao,Li Zhang
Aluminum metal has been regarded as a promising anode material for aqueous metal-air batteries. However, the stable cycling of Al anodes is challenging due to the severe parasitic corrosion of Al metal in alkaline electrolytes. Here, a novel additive, n -octylphosphonic acid (OPA), is introduced into the typical NaOH electrolyte system to improve the interfacial stability of Al anodes and thus promote high-performance Al-air batteries (AABs). Combining several experimental characterizations and theoretical calculation, it is proved that OPA molecules in an NaOH aqueous environment can modify the Al anode/electrolyte interface and alter the stacking of the discharge product. The electrolyte engineering is capable of anchoring dynamically to restrain side reactions through hydrogen bonds (H···O), homogenizing the dissolution of Al metal and avoiding precipitation agglomeration. As a proof of concept, AABs full cells with an electrolyte containing OPA achieve higher potential plateau and discharge capacity than those with a pure NaOH electrolyte. It paves a way to develop highly-efficient and eco-friendly electrolyte additive strategies for high-performance AABs devices and advance the current understanding of organic additive mechanisms in AABs.
研究领域:
材料科学
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电化学
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电池技术
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能源存储
✓ 已验证
产品关联
DOI
高影响因子
ChemPlusChem
·
2023
·Vol. 89
·期 5
·e202300620
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IF 3.4
Chenglu Liang,Xuesong Cai,Jinghang Lin,Yuan Chen,Yuxing Xie,Yang Liu
Graphical A π-d conjugated coordination polymer (CCP) Co-TABQ with C=O was used as electrode material for all organic symmetric lithium-ion batteries. The Co-TABQ/Co-TABQ full battery showed excellent rate performance, with the first discharge capacity of 197.7 mAh g −1 at 50 mA g −1 and the cycle capacity of 102.1 mAh g −1 after 50 cycles. Carbonyl rich conjugated polymer electrode materials for lithium-ion batteries possessed the advantages of strong molecular design ability, abundance and high theoretical capacity. In this work, a Co 2+ coordinated conjugated polymer using 2,3,5,6-tetraamino-p-benzoquinone (TABQ) as building block was constructed and developed as electrode material for all organic symmetric lithium-ion batteries, outputting a specific capacity of over 100 mAh g −1 after 50 cycles at 50 mA g −1 . Performances of Co-TABQ in half cells were explored. The Co-TABQ cathode delivered a capacity of 133.3 mAh g −1 after 150 cycles at 20 mA g −1 . When cycled at higher current density of 500 mA g −1 , the capacity gradually increased to 109.4 mAh g −1 after 4000 cycles. The Co-TABQ anode displayed a stable capacity of 568.6 mAh g −1 at 1 A g −1 . The charge transfer within the electrode was greatly reduced due to the metallic centers in the extended conjugated skeleton, and the reversible Li + storage was achieved by the active C=O and imine groups. This work showed the great potential of metal mediated conjugated polymer in Lithium-ion batteries.
研究领域:
材料科学
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电化学
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能源存储
✓ 已验证
DOI
高影响因子
Journal of Materials Chemistry A
·
2019
·Vol. 7
·期 34
·19862-19871
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IF 10.733
Qingfeng Fu,Renjie Li,Xiangzhen Zhu,Guisheng Liang,Lijie Luo,Yongjun Chen,Chunfu Lin,X. S. Zhao
Nb16W5O55 is considered as a promising anode material for lithium-ion batteries (LIBs) due to its high safety, good cyclability and high rate performance. However, it has not been practically used since it suffers from its limited capacity. Here, we demonstrate the design and synthesis of a tungsten-free and niobium-rich Al0.5Nb24.5O62 anode material having a very large theoretical capacity of 400 mA h g−1 and a stable shear ReO3 crystal structure. Both Al0.5Nb24.5O62 microsized particles (Al0.5Nb24.5O62-M) and porous microspheres (Al0.5Nb24.5O62-P) were successfully synthesized. In situ X-ray diffraction indicated the intercalated characteristic of Al0.5Nb24.5O62 and revealed the Li+ insertion into/extraction from its (010) crystallographic planes with high structural stability. Consequently, Al0.5Nb24.5O62-P exhibited a large practical capacity (321 mA h g−1 at 0.1C) and good cyclability (90.0% capacity retention after 500 cycles at 10C). In addition, Al0.5Nb24.5O62-P exhibited significant intercalation pseudocapacitive behavior (86.1% pseudocapacitive contribution at 1.1 mV s−1), high rate performance (192 mA h g−1 at 10C), high initial coulombic efficiency (94.9%) and safe working potential (∼1.68 V). Al0.5Nb24.5O62 also performed well in a LiNi0.5Mn1.5O4//Al0.5Nb24.5O62-P full cell. These research results indicate that Al0.5Nb24.5O62 is a practical anode material for high-energy, stable, fast-charging and safe LIBs.
研究领域:
材料科学
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电化学
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能源存储
✓ 已验证
DOI
高影响因子
JOURNAL OF ALLOYS AND COMPOUNDS
·
2022
·
IF 6.371
Chencheng Sun,Xiaoyu Wang,Jitao Geng,Yu Tan,Chengkui Lv,Cunqing Pei,Huaixin Wei,Dong Chen,Jun Yang
The development of electrode materials for Sodium-Ion Batteries (SIBs) has received more and more attention. Among them, vanadium sulfide, as a member of the transition metal sulfide family, owns the characteristics of rich electrochemical activity, high theoretical capacity and adjustable spatial structure. However, the complicated synthetic process, poor rate capability and intricate redox mechanism of vanadium sulfides make them less competitive for commercial use. In this work, a facile approach based on the ball-milling technique followed by adjusted annealing temperature is introduced to fabricate large-scale vanadium sulfides. This general phase-controlled method can bring three different crystal types of V 5 S 8 , V 3 S 4 and V 3 S 5 . With homogeneous covering of super P and Carbon Nano Tubes (CNTs), a conductive network that favors the Na ions/electrons transport in the vanadium sulfides-based electrodes can be fabricated. The V 5 S 8 exhibits the best performance in SIBs with specific capacity of 918 mAh g −1 at 0.1 A g −1 (100 cycles). Moreover, V 5 S 8 electrode also exhibits an ultra-rate capability of 333 mAh g −1 at 50 A g −1 after cycling lifespan (4000 loops). The extremely high pseudo-capacitance characteristics of V 5 S 8 is significant during the SIBs discharge/charge. Additionally, the V 5 S 8 anode also shows the high energy density of 165 Wh kg −1 in SIBs full cell.
研究领域:
材料科学
·
电化学
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能源存储
✓ 已验证
DOI
高影响因子
危险品化学品经营许可证（带存储）