JOURNAL OF ALLOYS AND COMPOUNDS
·
2020
·
IF 4.65
Jiuyang Xia,Fengping Zhang,Juli Liang,Kaixin Fang,Wenwei Wu,Xuehang Wu
Commercial Cu foam can be employed as a 3D current collector to accommodate Na metal for stable sodium metal batteries (SMBs). However, few studies focus on regulating the interphase structure and properties of Cu foam to achieve fast and uniform Na impregnation. Herein, a facile and controllable oxidation treatment strategy is used to in-situ construct a fluffy CuO/Cu 2 O surface layer on the skeleton of Cu foam (SF–Cu-3.6). The oxidation degree and interphase structure of Cu foam can be rationally designed by adjusting the concentration of (NH 4 ) 2 S 2 O 8 oxidant, which is directly related to the driving force of Na infusion. With an optimized interface, Na metal can be rapidly infused into SF-Cu-3.6 within 5 s and a structurally complete Na/SF-Cu-3.6 composite electrode with a flat surface and no visible void can be obtained. The SF-Cu-3.6 with a large surface area can be used as a 3D host for Na metal to lower the local current density during cycling, resulting in uniform Na deposition without dendrite formation and growth. In virtue of the structural advantages, the symmetric Na/SF-Cu-3.6 cell exhibits flat charge/discharge plateaus with a low overpotential of 12 mV and stable cycling up to 1000 h at 0.5 mA cm −2 . When paired with NaTi 2 (PO 4 ) 3 , the rate performance of the full cell using the Na/SF-Cu-3.6 composite anode is significantly better than that of the full cell using a bare Na anode.
研究领域:
材料科学
·
电化学
✓ 已验证
DOI
高影响因子
JOURNAL OF ALLOYS AND COMPOUNDS
·
2021
·
IF 5.316
Shuyue Yang,Zhen Xu,Jie Xu,Junlin Lu,Dongmei Zhang,Shibing Ni
Nitrogen doped carbon bridged Li 3 VO 4 -Ga 2 O 3 hybrid (Li 3 VO 4 -Ga 2 O 3 /NC) is first synthesized through an intermediate solution method with subsequent annealing. The Li 3 VO 4 -Ga 2 O 3 /NC hybrid exhibits robust pseudocapacitive charge storage owing to the synergetic effect between each component, resulting in ultra-high capacity and ultra-stable cyclability as anode for Li-ion batteries. At a specific current of 0.1 A g −1 , the Li 3 VO 4 -Ga 2 O 3 /NC electrode delivers high reversible capacity of 652.6 mA h g −1 after 400 cycles, without obvious capacity attenuation over cycling. After three periodic rate performance testing from 0.1 to 2.0 A g −1 over 260 cycles, the Li 3 VO 4 -Ga 2 O 3 /NC electrode delivers high discharge capacity of 750.3 mA h g −1 when reverting current to 0.1 A g −1 . The Li 3 VO 4 -Ga 2 O 3 /NC electrode also shows excellent long cycle stability at 1.0 A g −1 , delivering high discharge capacity of 450.4 mA h g −1 after 1600 cycles.
研究领域:
材料科学
·
电化学
·
能量存储
✓ 已验证
DOI
高影响因子
LANGMUIR
·
2025
·
IF 3.9
Wengxiang Ai,Chunman Yang,Qian Wang,Wenchang Han,Yongqi Wang,Jiyue Hou,Ziyi Zhu,Jinbao Zhao,Yiyong Zhang,Yingjie Zhang,Xue Li
Graphite anodes, with their capacity nearing the theoretical maximum of 372 mA h g−1, are increasingly being complemented by silicon-based materials, which offer a 10-fold higher capacity. Nevertheless, extreme volume expansion (>300%) of Si during cycling poses significant challenges to its practical deployment. Previous studies on the synthesis of binders are often intricate and not conducive to large-scale implementation. In this study, an innovative binder, denoted as HM, is developed by combining the macromolecular polysaccharide sodium hyaluronate with the small organic molecule malic acid without the need for any external triggers. A cross-linked network structure is formed in situ after heat treatment with silicon under vacuum conditions. The contact interface establishes a robust network structure through multiple macromolecular hydrogen bonds and chemical interactions. Consequently, the HM binder exhibits exceptional mechanical properties and efficiently lessens the volumetric change of silicon particles, thereby benefiting the generation of a stable solid electrolyte interphase. Electrochemical characterization demonstrates that the exceptional cycling stability of Si@HM electrodes can maintain a high capacity of 1949 mA h g–1 at 0.1 C and 1426 mA h g–1 at 0.5 C after 100 cycles. Furthermore, silicon anodes employing the HM binder demonstrate superior rate performance and reduced internal resistance compared to those of conventional binders, representing a significant advancement in performance. This research provides crucial perspectives for binder design and experimental evidence for the commercial utilization of silicon anodes within lithium–ion batteries.
研究领域:
材料科学
·
能源存储技术
·
化学工程
✓ 已验证
产品关联
DOI
PubMed
高影响因子
ACS Applied Materials & Interfaces
·
2019
·
IF 8.456
Wei Song,Hanqing Zhao,Jianqi Ye,Mengmeng Kang,Siyu Miao,Zhong Li
Ti–O–C channels for ultrafast sodium storage were constructed in N/S-co-doped TiO2–C nanofibers, which deliver a high rate performance of 181.9 mAh g–1 at 5 A g–1 after 3000 cycles. The existence of Ti–O–C bonds at the interface of TiO2–C phases was revealed by synchrotron radiation X-ray absorption spectra. Based on this, first-principles calculations further verified the low energy barrier for Na+ insertion/extraction in the Ti–O–C channels formed by the intimately integrated graphite layer with TiO2 near the surface. In addition, surface defects induced by heteroatoms accelerate the Na+ mass transfer through the pathway from the carbon surface to the Ti–O–C channel.
研究领域:
材料科学
·
电化学
✓ 已验证
DOI
PubMed
高影响因子
ELECTROCHIMICA ACTA
·
2024
·
IF 5.5
Lei Zhang,Bing Sun,Qinghua Liu,Lin Song,Teibang Zhang,Xiaobo Duan
Extensive research has focused on the lithium (Li) metal anode, but progress in developing this technology has been hindered by the formation of lithium dendrites and their irreversible effects. In this study, an inorganic LiF-Li 3 N-rich solid electrolyte interface (SEI) is established in ether electrolyte through the direct use of 2,3-difluoro-5-(trifluoromethyl)pyridine (DP) to enable uniform Li deposition and enhance interfacial properties for a stable Li metal anode. Theoretical calculations show that DP has a higher tendency to decompose on lithium metal. An alternative approach involving the inclusion of additional anions into the solvation sheath of Li + ions using weakly solvating solvents is proposed. During Li plating, DP is reduced to form a LiF and Li 3 N-rich SEI, resulting in a heterogeneous SEI layer on the Li metal anode surface. This approach allows stable cycling of Li|Li cells for over 1800 h at current densities of 5 mA cm −2 and 15 mAh cm −2 . The method presented here has potential significance in the identification of suitable electrolytes for future research on lithium metal anodes.
研究领域:
材料科学
·
电化学
·
能源存储
✓ 已验证
产品关联
DOI
高影响因子
JOURNAL OF ELECTROCERAMICS
·
2024
·
IF 1.7
Wang Yikui,Tao Jianming,Wang Jiangjie,Chen Shaoyang,Yang Yanmin,Lin Yingbin
Serious structural irreversibility and interfacial side reactions pose major challenges for the stable operation of LiCoO 2 cathodes at high voltages. Herein, we report a polymer-based solid electrolyte (SLP) composed succinonitrile, LiTFSI and PVDF as a binder to address these issues. The SLP binder exhibits superior performance compared to traditional PVDF and PVDF binders with LiTFSI, with higher ionic conductivity (8.46 × 10 − 5 S cm − 1 at 30 ℃), lower activation energy of 0.38 eV and excellent adhesion. Even with just 3% SLP binder, LiCoO 2 cathode operating at a cutoff voltage of 4.6 V and loaded with ~ 6.0 mg cm − 2 active material demonstrates improved rate capability at higher compaction densities, delivering a discharge specific capacity of 146.5 mAh g − 1 after 100 cycles at 0.5 C-rate. The SLP binder not only enhances Li + conduction but also facilitates the formation of a stable cathode-electrolyte interphase, thus reducing the Li + diffusion barrier and interface polarization, and enhancing battery’s performance at low temperature. Furthermore, the SPL binder’s high compatibility and elasticity with the electrolyte mitigate irreversible structural changes and volume expansion in LiCoO 2 during cycling, leading to better preservation of the layered structure and lower internal stress for stable cycling under high temperatures. This strategy provides a novel interface protection idea for electroceramic cathode materials and may facilitate commercial development.
研究领域:
材料科学
·
电化学
·
电池技术
✓ 已验证
DOI
高影响因子
ACS Applied Materials & Interfaces
·
2021
·
IF 9.229
Jingru Li,Han Su,Min Li,Jiayuan Xiang,Xianzhang Wu,Sufu Liu,Xiuli Wang,Xinhui Xia,Changdong Gu,Jiangping Tu
Lithium-metal batteries are promising candidates for the next-generation energy storage devices. However, notorious dendrite growth and an unstable interface between Li and electrolytes severely hamper the practical implantation of Li-metal anodes. Here, a robust solid electrolyte interphase (SEI) layer with flexible organic components on the top and plentiful LiF together with lithiophilic Zn nanoparticles on the bottom is constructed on Li metal based on the spray quenching method. The fluorinated interface layer exhibits remarkable stability to shield Li from the aggressive electrolyte and restrain dendrite growth. Accordingly, the modified Li electrode delivers a stable cycling for over 400 cycles at 3 mA cm–2 in symmetric cells. An improved capacity retention is also achieved in a full cell with a LiFePO4 cathode. This novel design of the artificial SEI layer offers rational guidance for the further development of high-energy-density lithium-metal batteries.
研究领域:
材料科学
·
电化学
·
能源存储
✓ 已验证
DOI
高影响因子
Advanced Energy Materials
·
2022
·Vol. 12
·期 11
·2103332
·
IF 29.698
Zheng Zhang,Shundong Guan,Sijie Liu,Bingkun Hu,Chuanjiao Xue,Xinbin Wu,Kaihua Wen,Ce-Wen Nan,Liangliang Li
Li metal is the next-generation anode material for high-energy-density Li-ion batteries. Unfortunately, its practical application is hampered by drawbacks such as an unstable solid electrolyte interphase and undesirable Li dendrites. Herein, an Fe-based protective layer with a valence gradient is constructed on Li anodes, which consists of an Fe 3+ /Fe 2+ -rich outer layer and an Fe 0 -containing inner layer. The protective layer not only isolates the underlying Li metal from the corrosive carbonate electrolyte, but also uniformly stores Li during plating and inhibits the growth of Li dendrites. The Li anode with the Fe-based protective layer shows dendrite-free Li plating/stripping behaviors; therefore, Li symmetric cells stably run for 1000 h at 1 mA cm -2 and 1 mA h cm -2 and even survive for 380 h at an ultra-high capacity of 30 mA h cm -2 . With such a highly stable Li anode, LiFePO 4 cells operate steadily for 1600 and 1000 cycles at 1 and 5 C, respectively. High-loading LiCoO 2 cells also present excellent cycling stability and rate capability, proving the advantages of the protective layer in Li anode protection.
研究领域:
材料科学
·
电化学
·
储能
·
电池技术
✓ 已验证
DOI
高影响因子
Nature Communications
·
2021
·Vol. 12
·期 1
·1-9
·
IF 14.919
Lin Zirui,Shi Hua-Yu,Lin Lu,Yang Xianpeng,Wu Wanlong,Sun Xiaoqi
Rechargeable aqueous zinc-organic batteries are promising energy storage systems with low-cost aqueous electrolyte and zinc metal anode. The electrochemical properties can be systematically adjusted with molecular design on organic cathode materials. Herein, we use a symmetric small molecule quinone cathode, tetraamino-p-benzoquinone (TABQ), with desirable functional groups to protonate and accomplish dominated proton insertion from weakly acidic zinc electrolyte. The hydrogen bonding network formed with carbonyl and amino groups on the TABQ molecules allows facile proton conduction through the Grotthuss-type mechanism. It guarantees activation energies below 300 meV for charge transfer and proton diffusion. The TABQ cathode delivers a high capacity of 303 mAh g −1 at 0.1 A g −1 in a zinc-organic battery. With the increase of current density to 5 A g −1 , 213 mAh g −1 capacity is still preserved with stable cycling for 1000 times. Our work proposes an effective approach towards high performance organic electrode materials.
研究领域:
材料科学
·
电化学
·
能源存储
✓ 已验证
产品关联
DOI
PubMed
高影响因子
ACS Sustainable Chemistry & Engineering
·
2021
·
IF 8.198
Zhen Zeng,Shang Wang,Jun Cheng,Guangmei Hou,Deping Li,Guifang Han,Lijie Ci
Solid polymer electrolytes (SPEs) are preferable in the pursuit for developing high-energy Li metal batteries due to their inherent flexibility and intimate contact with electrodes. However, continuous interfacial parasitic reactions and undesired Li dendrite growth caused by inhomogeneous plating/stripping of Li+ result in rapid deterioration of an SPE/Li interface. Herein, a novel Zn2+-containing SPE (SPE-xZn) with anionic groups partially tethered on the polymer chains is developed to meet these challenges. During cycling, Zn2+ cations inside the SPE-xZn will gradually migrate to the surface of a Li electrode and then evolve to a Li-Zn alloy layer, where Li+ can diffuse more efficiently. Meanwhile, owing to the electrostatic interaction, the immobilized anionic groups within SPE-xZn can alleviate local concentrated Li+ flux. The synergistic effects of an in situ formed alloy layer and unique macromolecular structure can promote uniform plating/stripping of Li, thus yielding a more stable SPE-xZn/Li interface. Therefore, steady cycling over 300 h at 0.2 mA cm–2 is achieved by Li/SPE-5Zn/Li, and an impressive capacity retention of 87.3% at 0.5 C after 800 cycles is realized by LFP/SPE-5Zn/Li with an average Coulombic efficiency of 99.90%.
研究领域:
材料科学
·
电化学
·
电池技术
✓ 已验证
产品关联
DOI
高影响因子
CHEMISTRY OF MATERIALS
·
2023
·
IF 8.6
Donggang Tao,Ting Li,Yudi Tang,Yuliang Cao,Fei Xu
Rechargeable magnesium batteries attract interest as advantageous energy-storage devices, but the application is being hampered by the deficiency of suitable cathodes. The traditional method to weaken the interaction between bivalent Mg2+ cations and the cathode material is to increase the anion radius, but excessive expansion of the anion would lead to a decrease of the theoretical capacity and offset the performance improvement. Herein, a new strategy using a redox-active polyatomic anion is developed in terms of copper tetraselenophosphate (Cu3PSe4) fabricated by the PSe43– anion. The covalent P–Se bond facilitates the negative charge delocalization of the PSe43– anion and weakens the interaction with Mg2+ cations, which result in rapid solid-phase Mg2+ diffusion kinetics. The PSe43– anion also provides extra capacities by reversible valence state change of the P element. Cu3PSe4 delivers a high Mg-storage capacity of 225 mAh g–1 at 50 mA g–1 and a superior rate performance of 62 mAh g–1 at 5000 mA g–1, as well as a stable cyclability of 500 cycles. The redox-active polyatomic anion strategy herein opens a new avenue for the exploration of magnesium battery cathodes with a comprehensive consideration of kinetic performance and theoretical capacity.
研究领域:
材料科学
·
电化学
·
能源存储
✓ 已验证
DOI
高影响因子
ACS Applied Materials & Interfaces
·
2024
·
IF 8.3
Yaxin Wang,Xuelong Liao,Wei Wang,Shan Chen,Jialei Chen,Huan Wang
The loose and randomly oriented byproduct (i.e., Zn4(OH)6SO4·xH2O, ZHS) in situ formed on the zinc (Zn) surface is recognized to be the primary cause for dendritic Zn growth and side reactions. Switching the detrimental passivation film into a dense and kinetically favorable solid electrolyte interphase (SEI) is a straightforward strategy to tackle these issues faced by Zn metal anodes but remains largely unexplored. Herein, a new polymer film directly grown on Zn metal through room-temperature plasma-enhanced chemical vapor deposition is proposed to induce the lateral growth of ZHS nanosheets and decrease the Zn2+ desolvation barrier, thereby forming a beneficial composite SEI for suppressing Zn dendrite growth and surface corrosion. As a result of the joint effect, we realize an impressively stable cycling behavior in symmetric cell over 3400 h at 2 mA cm–2. Moreover, full cells also demonstrate prolonged lifespans. This work opens a new avenue for stabilizing Zn metal batteries by turning detrimental ZHS into a favorable interlayer.
研究领域:
材料科学
·
电化学
·
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）