CELLULOSE
·
2024
·
IF 4.9
Ma Jianzhe,Nan Hui,Yang Guijun,Li Zhike,Wang Jianhao,Zhou Jingyuan,Xue Caihong,Wang Xianlan,Xu Shiai
Flexible lithium-ion batteries (LIBs) are receiving widespread attention, and how to obtain the high flexibility, safety, and energy density of LIBs at the same time are one of the main challenges in the field of flexible electronics. The multi-network structure formed by cellulose nanofiber (TOCNF) not only provided sufficient mechanical support and excellent flexibility for the electrode but also promoted uniform distribution of conductive agents and active materials. In this work, we prepared an eco-friendly TOCNF binder from wheat straw, using a method involving 2, 2, 6, 6-tetramethylpiperidinyl-1-oxyl oxidation and high-intensity ultrasonic treatment. Additionally, we enhanced the performance of TOCNF by introducing Li + through ion exchange, resulting in lithium-functionalized cellulose nanofibers (TOCNF-Li), which were employed as a novel binder for LiFePO 4 cathodes. The findings show that, when employing TOCNF-Li binder, batteries were able to obtain an initial discharge capacity of 163 mAh g –1 at 0.1 C rate and maintained 93.2% of the initial reversible capacity after 400 cycles at 2 C rate. Notably, at 5 C rate, the discharge capacity reached 133.7 mAh g −1 , with a capacity decay of only 16.1%. TOCNF-Li played a role in increasing Li + content, opening a new pathway for Li + transport, consequently enhancing Li + diffusion efficiency and charge–discharge performance. Overall, TOCNF-Li serves as a novel, environmentally friendly, and efficient binder for flexible LIBs.
研究领域:
材料科学
·
能源技术
✓ 已验证
产品关联
DOI
高影响因子
Journal of Energy Chemistry
·
2021
·
IF 9.676
Shuang Mu,Weilin Huang,Wuhui Sun,Ning Zhao,Mengyang Jia,Zhijie Bi,Xiangxin Guo
The solid polymer electrolyte (SPE) is one of the most promising candidates for building solid lithium batteries with high energy density and safety due to its advantages of flexibility and light-weight. However, the conventional monolayered electrolytes usually exhibit unstable contacts with either high-voltage cathodes or Li-metal anodes during cell operation. Herein, heterogeneous dual-layered electrolyte membranes (HDEMs) consisting of the specific functional polymer matrixes united with the designed solid ceramic fillers are constructed to address the crucial issues of interfacial instability. The electrolyte layers composed of the high-conductivity and oxidation-resistance polyacrylonitrile (PAN) combined with Li 0.33 La 0.557 TiO 3 nanofibers are in contact with the high-voltage cathodes, achieving the compatible interface between the cathodes and the electrolytes. Meanwhile, the electrolyte layers composed of the high-stability and dendrite-resistance polyethylene oxide (PEO) with Li 6.4 La 3 Zr 1.4 Ta 0.6 O 12 nanoparticles are in contact with the Li-metal anodes, aiming to suppress the dendrite growth, as well as avoid the passivation between the PAN and the Li-metal. Consequently, the solid LiNi 0.6 Co 0.2 Mn 0.2 O 2 ||Li full cells based on the designed HDEMs show the good rate and cycling performance, i.e. the discharge capacity of 170.1 mAh g −1 with a capacity retention of 78.2% after 100 cycles at 0.1C and 30 °C. The results provide an effective strategy to construct the heterogeneous electrolyte membranes with double-side stable electrode/electrolyte interfaces for the high-voltage and dendrite-free solid lithium batteries.
研究领域:
材料科学
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电化学
·
能量存储
✓ 已验证
DOI
高影响因子
JOURNAL OF POWER SOURCES
·
2023
·
IF 9.2
Yueyue Wang,Yan Wang,Xiang Li,Linze Lv,Weibo Huang,Qiang Shi,Honghe Zheng
Silicon (Si) is one of the most promising anode materials for high-capacity lithium-ion batteries. However, its drastic volume changes during cycling lead to fast capacity decay. Binders play an important role in maintaining the structural integrity of electrodes. This paper proposes a three-dimensional binder network, which synthesized by weaving Ni 2+ anchored soft gellan gum chains with linear rigid polyvinyl alcohol chains. Benefiting from the soft-rigid synergy and self-recovery ability of the obtained binder, the Si anode delivers over 1500 mAh g −1 after 500 cycles at 2.1 A g −1 , and post-analysis proofs that this binder can buffer the volume changes of Si particles and retain the overall stability of the electrode. In addition, the optimized Si anode still have a high capacity retention of ca. 50% even at 84 A g −1 , because the binder network can provide uniform Li + flux and more Li + transport channels for the electrode.
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
·
2025
·
IF 8.2
Hongxing Wang,Zhipeng Yin,Chengwei Ma,Zipeng Sun,Hao Feng,Fei Chen,Jiangqi Zhou,Tinglu Song
Lithium–sulfur (Li–S) battery systems are universally recognized as frontrunners in next-generation energy storage owing to their energy densities exceeding 2600 Wh kg–1. Nevertheless, their practical implementation remains constrained by severe Li metal anode degradation caused by polysulfide shuttle mediated corrosion, which drastically decreases achievable energy densities. This work pioneers an innovative interfacial engineering strategy leveraging transition metal ion synergies to fundamentally address this challenge. Through chemically induced anion modulation, nickel species spontaneously reconfigure into a protective solid electrolyte interphase (SEI) at Li surfaces. This engineered inorganic-dominant architecture demonstrates dual functionality that effectively passivates polysulfide-induced electrochemical corrosion and dramatically curtails electrolyte decomposition kinetics. Remarkably, even in LiNO3-free configurations, the optimized system achieves exceptional cycling stability (76.4% capacity retention). These findings establish a paradigm-shifting framework for developing practically viable high energy density Li–S systems through a rational interface design.
研究领域:
储能材料
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电化学
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电池技术
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材料科学
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界面工程
✓ 已验证
产品关联
DOI
PubMed
高影响因子
ACS Applied Materials & Interfaces
·
2019
·
IF 8.456
Mengfei Zhu,Yuepeng Pang,Fuqiang Lu,Xinxin Shi,Junhe Yang,Shiyou Zheng
Li–B–H complexes facilely prepared via partial dehydrogenation of LiBH4 are presented in this study as solid electrolytes for Li batteries. An exceptionally high Li-ion conductivity is found for the Li–B–H complex with 7.5 wt % H2 desorption under 3 bar H2 pressure, which reaches 2.7 × 10–4 S cm–1 at 35 °C, more than 4 orders higher than that of LiBH4. In-depth characterizations show that LiH and [Li2B12H11+1/n]n are in situ formed in the LiBH4 matrix and the interface layer between [Li2B12H11+1/n]n and LiBH4 is believed to be responsible for the high Li-ion conductivity. Moreover, this Li–B–H complex also exhibits excellent electrochemical stability, which enables the stable cycling of all-solid-state batteries at room temperature.
研究领域:
材料科学
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储能
·
固态化学
·
电化学
✓ 已验证
DOI
高影响因子
ACS Omega
·
2021
·
IF 3.512
Mingyu Zhang,Chaoyong Wang,Junkai Zhang,Gang Li,Li Gu
LiNi0.8Co0.1Mn0.1O2 (NCM811) became a research hot point because of its low cost, environmental friendliness, and excellent electrochemical performance. However, Li+/Ni2+ intermixing is an essential factor affecting its applicability. Doping could be an important method to improve the electrochemical performance of NCM811-based cathode materials. In this work, La and Al co-doped NCM811 was prepared by a solid-state method. Results from X-ray diffraction (XRD), scanning electron microscopy (SEM), and energy-dispersive spectroscopy (EDS) and electrochemical performance were discussed in depth. These showed that when La and Al doping concentrations were 1 and 0.5%, the samples showed the best performance. The as-improved performances were mainly attributed to the reduced Li+/Ni2+ intermixing, suppressed phase transition, and decreased potential polarization and impedance.
研究领域:
材料科学
·
电化学
✓ 已验证
产品关联
DOI
PubMed
高影响因子
IONICS
·
2023
·Vol. 29
·期 9
·3573-3584
·
IF 2.8
Zhang Canping,Zhou Qin,Wang Hairui,Liu Jianwen,Zhang Yanqing,Wang Shiquan
Fe 3 O 4 and Fe 3 O 4 /NiO heterostructures were successfully prepared by a simple one-step solvothermal method. The morphology of Fe 3 O 4 /NiO heterostructures is flower-like spheres composed of nanosheets with a thickness of 10–20 nm. As anode material for lithium-ion batteries (LIBs), the electrochemical performance of the Fe 3 O 4 and Fe 3 O 4 /NiO heterostructures are comparatively investigated. At current density of 100 mA g −1 , the Fe 3 O 4 /NiO heterostructures can maintain 1021 mAh g −1 after 100 cycles. The discharge capacity can still maintain at 500 mAh g −1 and the coulomb efficiency is always stable at 99.6% after 1000 cycles at 1 A g −1 . The Fe 3 O 4 /NiO heterostructures also have lower impedance and better rate capability, compared with the bare Fe 3 O 4 electrode. Moreover, the electrochemical properties of the Fe 3 O 4 /NiO heterostructures can be further improved when the new binder CMC-Li is used. At 100 mA g −1 , it can still maintain 1544 mAh g −1 after 100 cycles. These loose-layered nanosheets can effectively alleviate the volume expansion of materials in the process of charge and discharge. Meanwhile, the large surface area can provide more reaction sites. The ultra-thin nanosheet can also reduce the diffusion distance of lithium ions, so that the Fe 3 O 4 /NiO heterostructures have excellent performance in lithium-ion batteries.
研究领域:
材料科学
·
能源存储
✓ 已验证
产品关联
DOI
高影响因子
Energy & Environmental Materials
·
2021
·Vol. 6
·期 2
·e12317
·
IF 15.122
Xingyi Wang,Kailin Luo,Lixin Xiong,Tengpeng Xiong,Zhendong Li,Jie Sun,Haiyong He,Chuying Ouyang,Zhe Peng
Severe lithium (Li) dendrite growth caused by the uneven overpotential deposition is a formidable challenge for high energy density Li metal batteries (LMBs). Herein, we investigate a synergetic interfacial kinetic to regulate Li deposition behavior and stabilize Li metal anode. Through constructing Li alloying matrix with a bi-functional silver (Ag)-Li 3 N blended interface, fast Li + conductivity and high Li affinity can be achieved simultaneously, resulting in both decreased Li nucleation and mass transfer-controlled overpotentials. Beyond these properties, a more important feature is demonstrated herein; that is, the inward diffusion depth of the Li adatoms inside of the Ag site can be restricted by the Li + solvation structure in a highly coordinating environment. The latter feature can ensure the durability of the operational Ag sites, thereby elongating the Li protection ability of the Ag-Li 3 N interface greatly. This work provides a deep insight into the synergetic effect of functional alloying structure and Li + solvation mediated interfacial kinetic on Li metal protection.
研究领域:
材料科学
·
电化学
✓ 已验证
产品关联
DOI
高影响因子
ACS Nano
·
2023
·
IF 17.1
Yingmeng Zhang,Jianhua Zhang,Zaohui Ding,Lixuan Zhang,Libo Deng,Lei Yao,Hui Ying Yang
Li metal exhibits high potential as an anode material for next-generation high-energy density batteries. However, the nonuniform transport of Li+ ions causes Li-dendrite growth at the metal electrode, leading to severe capacity decay and a short cycling life. In this study, negatively charged lithiophilic sites (such as cationic metal vacancies) were used as hosts to regulate the atomic-scale Li+-ion deposition in Li-metal batteries (LMBs). As a proof of concept, three-dimensional (3D) carbon nanofibers (CNFs) decorated with negatively charged TiNbO4 grains (labeled CNF/nc-TNO) were confirmed to be promising Li hosts. Cationic vacancies caused by the carbothermal reduction of Nb5+ and Ti4+ ions generated a negatively charged fiber surface and strong electrostatic interactions that guided the Li+-ion flux to the shadowed areas underneath the fiber and throughout the fibrous mat. Consequently, circumferential Li-metal plating was observed in the CNF/nc-TNO host, even at a high current density of 10 mA cm–2. Moreover, CNF/nc-TNO asymmetric cells delivered a significantly more robust and stable Coulombic efficiency (CE) (99.2% over 380 cycles) than cells comprising electrically neutral CNFs without cationic defects (which exhibits rapid failure after 20 cycles) or Cu foil (which exhibits rapid CE decay, with a CE of 87.1% after 100 cycles). Additionally, CNF/nc-TNO exhibited high stability and low-voltage hysteresis during repeated Li plating/stripping (for over 4000 h at 2 mA cm–2) with an areal capacity of 2 mAh cm–2. It was further paired with high-voltage LiNi0.8Co0.1Mn0.1 (NCM811) cathodes, and the full cells showed long-term cycling (220 cycles) with a CE of 99.2% and a steady rate capability.
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
JOURNAL OF POWER SOURCES
·
2024
·
IF 8.1
Yang Xia,Shengwei Yin,Yaning Liu,Tianqi Yang,Jun Zhang,Hui Huang,Yongping Gan,Xinping He,Xinhui Xia,Ruyi Fang,Wenkui Zhang
Polyethylene oxide (PEO) based solid-state electrolytes are known for the low manufacturing cost and excellent processability, but their practical application is paved with thorns including the inferior ionic conductivity, low Li + transfer number and insufficient Li dendrite blocking ability. Herein, we propose organic montmorillonite (OMMT) with expanded layer spacing (1.97 nm) as versatile fillers to construct PEO-OMMT electrolyte, in which OMMT not only increases Li + transfer number (0.56) and ionic conductivity (7.15 × 10 −4 S cm −1 ), providing fast ionic transport channels, but also endows PEO with high mechanical strength, resulting remarkable Li dendrite blocking ability (>2100 h). Additionally, the high dielectric constant and Lewis-rich polar sites of OMMT facilitate the dissociation of lithium salts and the rapid formation of LiF and Li 3 N-rich solid electrolyte interface layers. Impressively, the LiFePO 4 | PEO-OMMT | Li cell shows a high initial capacity (154.4 mAh g −1 at 0.5C) with ultralong cycling lifespan (>1200 cycles). Similarly, the LiNi 0.83 Mn 0.05 Co 0.12 O 2 | PEO-OMMT | Li cell retains a high discharge capacity of 151.5 mAh g −1 after 100 cycles at 0.2C. This work highlights the indelible contributions of OMMT functionalized fillers in improving the interfacial stability of PEO based solid-state electrolytes, paving a feasible avenue for the practical application of solid-state lithium metal batteries.
研究领域:
材料科学
·
电化学
·
电池技术
·
纳米技术
✓ 已验证
产品关联
DOI
高影响因子
Nano-Micro Letters
·
2022
·Vol. 14
·期 1
·1-14
·
IF 23.655
Li Xinyang,Wang Yong,Xi Kai,Yu Wei,Feng Jie,Gao Guoxin,Wu Hu,Jiang Qiu,Abdelkader Amr,Hua Weibo,Zhong Guiming,Ding Shujiang
The composite gel electrolyte with low tortuosity ion-conducting arrays (GPE/ICAs) exhibiting high room-temperature ionic conductivity (1.08 mS cm −1 ) was successfully prepared by directionally growing ice crystals and in-situ polymerization.
The stable and rapid Li + migration through ICAs in the GPE is proved by 6 Li solid-state nuclear magnetic resonance and synchrotron radiation X-ray diffraction combined with computer simulations.
Li/LiFePO 4 full cells using GPE/ICAs exhibit excellent cycle performance and high-capacity retention at wide temperature (0–60 °C), which has the potential towards all-weather practical solid-state batteries.
研究领域:
材料科学
·
电化学
·
电池技术
✓ 已验证
DOI
PubMed
高影响因子
CHEMICAL ENGINEERING JOURNAL
·
2022
·
IF 16.744
Pengcheng Li,Long Chen,Zuxin Wen,Daxu Zhang,Ying Zhang,Ning Zhang,Gen Chen,Xiaohe Liu
Lithium metal is recognized as the next generation anode material due to its ultra-high capacity. However, the safety hazards caused by the dendritic lithium growth hinder its practical application. In this work, rare earth nitrates, such as Y(NO 3 ) 3 , are introduced as electrolyte additives because of the unfixed coordination number and complex coordination configuration for rare earth cations. Molecular dynamics simulation reveals that the rare earth ion changes the solvation structure of the lithium ion. When it is combined with fluoroethylene carbonate (FEC), the interphase generated from electrochemical reactions is favorable for the dense Li deposition. As a result, a stable and high Coulombic efficiency is achieved for Li/Cu cells in commercial carbonate electrolyte with such additive. The Li/Li symmetrical cells can operate>1000 h at current density of 1 mA cm −2 . Moreover, the NCM811/Li full cells deliver superior cycling stability and better rate performance. This strategy sheds light on utilizing rare earth elements to optimize the electrolyte for lithium metal anode and it can be extended to other electrolytes aiming at sodium and potassium battery chemistry.
研究领域:
材料科学
·
电化学
·
电池技术
✓ 已验证
DOI
高影响因子
危险品化学品经营许可证（带存储）