JOURNAL OF ELECTROANALYTICAL CHEMISTRY
·
2021
·
IF 4.464
Xianli Huang,Dongmei Zhuang,Zhihui Chen,Hao Gong,Tao Wang,Jianping He,Xiaogang Zhang
It is so far an efficient way for depressing dendrite growth to adjust the electrolyte composition . Therefore, we study the electrochemical behavior of lithium metal electrodeposited in a LiPF 6 -propylene carbonate (PC) electrolyte by adding two kinds of crown ether . The effect of crown ether concentration on the Coulombic efficiency of lithium electrodes has be evaluated, and the electrodeposition behavior of lithium metal on negative electrode has be analyzed by cyclic voltammetric curve, electrodeposition curve and lithium metal deposition morphology. The results show that a certain amount of crown ether (15-crown-5 and 12-crown-4) can preferentially coordinate with lithium ion in the electrolyte and form complex compounds, which reduce the lithium ions concentration in the “hot spot” and level the lithium electrode greatly by inhibiting the preferential growth of lithium dendrite . A uniform and dense nano-columnar lithium layer could be obtained at the current density of 2.0 mA cm −2 when the deposition amount is 1.0 mAh cm −2 , and the concentration of 15-crown-5 and 12-crown-4 ether are 0.3 M and 0.2 M, respectively. Gaussian calculation results show that the lithium-crown complex has a relatively lower lowest unoccupied molecular orbit (LUMO), where electrons could be injected during the charging process, leading to decreased Coulumbic efficiency.
研究领域:
材料科学
·
电化学
✓ 已验证
产品关联
DOI
高影响因子
Green Energy & Environment
·
2024
·
IF 10.7
Wei Lu,Anshun Zhao,Qiuxu Chen,Sihan Liu,Mingxi Yu,Zihao Wang,Ze Gao,Xue Zhao,Guiru Sun,Ming Feng
An artificial solid electrolyte interphase (SEI) with lithiophilic sites and chemical bonds anchoring lithium polysulfides (LiPSs) has been developed as a potential solution to protect the lithium (Li) metal anode of Lithium−sulfur (Li–S) batteries. This strategy aims to guide consistent Li deposition and relieve lithium corrosion. Herein, the evolution process of lithiophilic sites based on aluminum fluoride (AlF 3 ) in an artificial SEI is disclosed in Li–S batteries with metal−based lithiophilic sites. The polyester polymer (PMMA and PPC)/AlF 3 artificial SEI (MPAF−SEI) was homogeneously anchored on Li anode by in−situ polymerization. The conversion of AlF 3 into Li–Al and LiF lithiophilic sites effectively reduce the Li nucleation overpotential and prevents the formation of Li dendrites. At the same time, the polymer can anchor LiPSs by chemical bonds and prevents Li corrosion. The optimized MPAF−SEI protected Li demonstrates excellent stability for over 3000 h at a capacity of 1 mAh cm −2 in Li || Li symmetric cells. The Li–S battery with low N/P (4) exhibits a capacity of 532.6 mAh g −1 over 300 cycles lifespan at 0.5 C.
研究领域:
材料科学
·
电化学
✓ 已验证
DOI
高影响因子
CHEMICAL ENGINEERING JOURNAL
·
2025
·
IF 13.2
Ruiqi Che,Sha Cheng,Cheng Huang,Ming Liu,Zhongao Chen,Jin Han,Wen Chen,Pengchao Zhang
Lithium dendrites, growing during the charging and discharging processes, can pierce the separators and lead to internal short circuits, which is one of the main factors resulting in thermal runaway of lithium metal batteries (LMBs). In this work, we developed a poly(vinylidene fluoride) (PVDF)-based Janus separator with an ultrathin polypyrrole (PPy) layer towards efficiently suppressing lithium dendrite growth. The PPy layer with thickness of approximately 200 nm has Pyrrole-N with lone pairs of electrons, which can act as nucleation sites for lithium ions. As a result, lateral lithium deposition can be achieved on the anode, thus preventing the lithium dendrites from piercing the separators. Stable stripping/plating performance over extended cycling and a capacity retention rate of 76.8% after 1000 cycles have been achieved in the Janus PVDF/PPy separator-based Li//Li symmetric cells and Li//LiFePO 4 half cells, respectively. The development of Janus separators with conductive polymer layers presents a promising solution for improving the safety and electrochemical performance of LMBs.
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
Advanced Energy Materials
·
2025
·
IF 26
Bing Sun,Lingling Kuang,Meichun He,Qin Zhang,Yunfeng Guan,Chengzhi Zhang,Dongmei Zhang,Cunyuan Pei,Pengju Li,Shibing Ni
Lithium (Li) metal batteries offer high energy densities but suffer from uncontrolled lithium deposition, causing serious dendrite growth and volume fluctuation. Tailorable Li nucleation and uniform early-stage plating are essential for homogenous Li deposition. Herein, insertion type Li 3 VO 4 is first demonstrated as efficient lithiophilic sites trapping Li + ions for homogenous nucleation. By homogenizing the distribution of electric field and ions flux via an ingenious architecture design with Li 3 VO 4 nanodots grown on the carbon fibers (LVO@CNFs), leveling Li metal deposition after nucleation is also realized. These, together, result in smooth and dendrite-free Li deposition on the LVO@CNFs via a trapping-and-leveling model, giving rise to unprecedented performance (highly stable Li plating/stripping exceeding 2500 h at 2 mA cm −2 under 3 mA h cm −2 capacity, high-capacity retention of 82.5% over 500 cycles in a Li@LVO@CNFs//LiFePO 4 battery). The successful design of Li metal deposition host via insertion-type Li 3 VO 4 may pave a new way for long lifespan Li metal 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
JOURNAL OF POWER SOURCES
·
2017
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IF 6.395
Biyi Xu,Wenlong Li,Huanan Duan,Haojing Wang,Yiping Guo,Hua Li,Hezhou Liu
This paper proposes a strategy to stabilize the garnet/Li interface by introducing Li 3 PO 4 as an additive in garnet-type Li 6.5 La 3 Zr 1.5 Ta 0.5 O 12 . The Li 3 PO 4 -added Li 6.5 La 3 Zr 1.5 Ta 0.5 O 12 electrolyte exhibits a room-temperature Li-ion conductivity of 1.4 × 10 −4 S cm −1 , which is less than that of the Li 3 PO 4 -free counterparts (4.6 × 10 −4 S cm −1 ). However, the presence of Li 3 PO 4 improves the interfacial compatibility and suppresses Li-dendrite formation during Li-metal plating/stripping. The symmetric Li/garnet/Li cells with Li 3 PO 4 -added Li 6.5 La 3 Zr 1.5 Ta 0.5 O 12 have been successfully cycled at a current density of 0.1 mA cm −2 at 60 °C for 60 h; on contrast, the control cells with Li 3 PO 4 -free Li 6.5 La 3 Zr 1.5 Ta 0.5 O 12 display noisy potential with large voltage polarization and get short-circuited completely after 33-h cycling under the same operating condition. The outstanding interface stability can be attributed to the in situ reaction of the Li flux with Li 3 PO 4 to form a self-limiting and ion-conducting interphase, Li 3 P, which is confirmed experimentally.
研究领域:
材料科学
·
电化学
✓ 已验证
DOI
高影响因子
Battery Energy
·
2025
·
IF 9.9
Jun Ma,Ruilin He,Yidong Jiang,Ludan Zhang,Hongli Xu,Hongbo Zeng,Chaoyang Wang,Xiaoxiong Xu,Yonghong Deng,Jun Wang,Shang-Sen Chi
Solid-state electrolyte (SSE) is a potential way to solve the safety problems of lithium metal batteries (LMBs), and Li 6.5 La 3 Zr 1.5 Ta 0.5 O 12 (LLZTO) is one of the most extensive research SSEs due to its good air stability and wide electrochemical window. However, the residual alkali on LLZTO surface limits its application with polyvinylidene difluoride (PVDF)-contained binders, and the uncontrollable lithium dendrites growing between the grain boundaries of LLZTO particles would lead to rapid capacity fading and potential short circuit risk. Herein, by in situ coating Li 3 PO 4 (LPO) on LLZTO particles (LLZTO@LPO) evenly, the residual alkali on the LLZTO surface is neutralized and the pH value is reduced to 8.84. The modified LLZTO can be mixed with PVDF solution and shows good fluidity without a cross-linking reaction, making the subsequent ceramic coating on the separator feasible. The LLZTO@LPO coating polyethylene (PE) separator can achieve 1400 h (115% increase) stable cycling under 1 mA cm −2 current density in the Li∥Li symmetrical cell and 80% capacity retention after 260 cycles (NCM622-Li coin cell with 3 mAh cm −2 loading). Furthermore, the LLZTO SSE pellets were prepared with the LLZTO@LPO and assembled in coin cell. The critical current density (CCD) result increases from 0.7 to 1.6 mA cm −2 owing to that the LPO coating effectively inhibits the lithium dendrites formation through LLZTO grain boundaries. This work provides a strategy for fabricating the coating layer on LLZTO to improve the stability of LMBs.
研究领域:
材料科学
·
电化学
✓ 已验证
DOI
高影响因子
CHEMICAL ENGINEERING JOURNAL
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2020
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IF 10.652
Yuan Tian,Yongling An,Chuanliang Wei,Yuan Tao,Yuchan Zhang,Huiyu Jiang,Liwen Tan,Jinkui Feng,Yitai Qian
Lithium (Li) metal anode is deemed as one of the most fascinating anodes due to its high energy density . Nonetheless, low Coulombic efficiency and safety issues caused by detrimental Li dendrites growth severely hamper its practical application. Herein, we construct an ultrafine TiO 2 confined in 3D freestanding carbon paper by one-step green in-situ oxidation of Ti 3 C 2 T x MXene film with greenhouse gas CO 2 . The lithiophilic TiO 2 seeds and freestanding 3D carbon matrix can synergistically induce uniform Li deposition and buffer the volume changes during lithium striping and deposition, which ensure improved electrochemical performance with high Coulombic efficiency and low overpotential, etc . The growth process of metallic Li on C/TiO 2 is also systematically investigated. Moreover, the C/TiO 2 @Li||LiFePO 4 full batteries present a stable cycling performance over 250cycles at 1.0C and superior rate performance. Additionally, this work proposes an alternative way to utilize CO 2 , which may alleviate greenhouse effect and boost sustainable development. These results may be useful for both the design of dendrite-free lithium metal batteries and the sustainable utilizing of CO 2 .
研究领域:
材料科学
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能源存储
·
可持续发展
✓ 已验证
产品关联
DOI
高影响因子
ACS Applied Nano Materials
·
2024
·
IF 5.3
Zhen Zhang,Xiao-Feng Xu,Yu-Ze Sun,Zhao-Jian Li,Hong Gao,Yun-Ze Long,Hong-Di Zhang
Lithium metal batteries offer a huge opportunity to develop energy storage systems with high energy density and high discharge platforms. However, the battery is prone to thermal runaway and the problem of lithium dendrites accompanied by high energy density and excessive charge and discharge. This study presents an assisted assembly technique (AAT) based on flexible barium titanate (BTO) and poly(vinylidene fluoride-co-hexafluoropropylene) (PVDF-HFP) nanofibers for preparation of a battery separator. AAT was used to combine the BTO diaphragms with high thermal stability and the PVDF-HFP diaphragms with good Elasticity and piezoelectricity, and the thermal stability was improved by 200 and 125% increase in battery cycle life compared to PVDF-HFP diaphragms alone. And demonstrated excellent thermal closure performance between 160 and 200 °C. Furthermore, the piezoelectric effect of the composite film prevents the growth of lithium dendrites in the vertical direction, avoiding the trouble of lithium dendrites penetrating the battery separator. Therefore, the two safety guarantee properties of the composite separator greatly enhance the safety and service life of the battery, which allows the application of lithium batteries to be further improved in the application scenario and application scale.
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
JOURNAL OF COLLOID AND INTERFACE SCIENCE
·
2024
·
IF 9.4
Xingtao Qi,Zhuqing Huang,Ze Zhang,Junchao Wei,Zhenyu Yang
The commercialization of lithium metal batteries (LMBs) is encountering significant challenges due to the electrolyte incompatibility and poor mechanical properties of polyolefin separators, as well as the hazardous growth of lithium dendrites at the anode. Simultaneously, the development of safe and environmentally-friendly separators has become a central focus in rechargeable battery technology. In this study, we introduce a novel Janus separator (CP@SiO 2 ), featuring a composite structure with cellulose paper (CP) as the base layer and electrospun polyvinylidene fluoride (PVDF) nanofibers as the top layer. The nanofibers are uniformly coated with mesoporous SiO 2 nanoparticles through hydrogen bonding. The CP@SiO 2 separator leverages its three-dimensional lithium-ion channels and rigid ceramic particles to enhance electrolyte retention and stabilize lithium metal anodes (LMA). Shielded by this separator, LMA exhibits an impressive cycling performance, enduring a current density of 2 mA cm −2 for 350 h without short-circuiting, effectively doubling the cycle life compared to conventional PP separators. Furthermore, the Li/LiFePO 4 cell utilizing the CP@SiO 2 separator demonstrates a high capacity of 101 mAh·g −1 at 5C, with 90 % capacity retention after 1000 cycles. This outstanding electrochemical performance is attributed to the compatible anode/separator interface and the effective inhibition of lithium dendrite growth. The research presented in this work capitalizes on a synergistic configuration design, offering a promising pathway towards the development of high-safety and advanced lithium-ion separators.
研究领域:
材料科学
·
能源技术
✓ 已验证
产品关联
DOI
PubMed
高影响因子
ADVANCED FUNCTIONAL MATERIALS
·
2024
·
IF 18.5
Wangming Tang,Teng Zhao,Ke Wang,Tianyang Yu,Ruixin Lv,Li Li,Feng Wu,Renjie Chen
Issues with lithium dendrite growth and dead lithium formation limit the practical application of lithium metal batteries, especially under high current conditions where uneven temperature distribution leads to serious safety concerns. Herein, In situ assembly of polydopamine (PDA) and aluminum nitride (AlN) coatings on polypropylene (PP) separator is introduced to address these challenges. The AlN particles are encapsulated by PDA, and the functional groups in PDA form Al-O coordination bonds with Al 3+ , which promote uniform Li + flux and reduce the migration barrier of Li + , thereby enabling dendrite-free lithium deposition. In addition, the designed PDA@AlN@PP separator exhibits excellent electrolyte wettability, enhanced mechanical performance, and stable thermal resistance, providing a uniform thermal distribution and serving as a robust barrier against dendrite penetration. As a result, symmetric Li||Li cells (over 1800 h at 1 mA cm −2 and 1 mAh cm −2 ) and Li||Cu cells (over 600 cycles at 0.5 mA cm −2 and 0.5 mAh cm −2 , coulombic efficiency over 98%) demonstrate outstanding long cycle performance and high coulombic efficiency. Moreover, the corresponding Li||LiFePO 4 cells exhibit a high specific capacity of 91.3 mAh g −1 at 5 C. This work provides a new approach for designing functionalized separators for high-performance lithium metal batteries.
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
Polymers
·
2019
·Vol. 11
·期 8
·1296
·
IF 3.164
Wenwen Ding,Chun Wei,Shiqi Wang,Linmin Zou,Yongyang Gong,Yuanli Liu,Limin Zang
Gel polymer electrolyte (GPE) is a promising candidate for lithium-ion batteries due to its adhesion property (like a solid), diffusion property (like a liquid), and inhibition of the growth of lithium dendrite. In this paper, 2-(2-ethoxyethoxy)ethyl acrylate (EOEOEA) and LiBF4electrolyte were mixed as precursors of gel polymer electrolytes. Through thermal curing, a thermally stable GPE with high ionic conductivity (5.60 × 10−4s/cm at 30 °C) and wide room temperature electrochemical window (4.65 V) was prepared, and the properties of the GPE were measured by linear sweep voltammetry (LSV), AC impedance spectroscopy, Thermogravimetric analysis (TG), and X-ray diffraction (XRD) techniques. On the basis of the in-situ deep polymerization on a LiFePO4electrode and cellulose membrane in a battery case, EOEOEA-based GPE could be derived on both LiFePO4electrode and cellulose membrane. Meanwhile, the contact between GPE, LiFePO4electrode, and lithium electrode was promoted. The capacity retention rate of the as-prepared LiBF4-EOEOEA 30% gel lithium battery reached 100% under the condition of 0.1 °C after 50 cycles, and the Coulombic efficiency was over 99%. Meanwhile, the growth of lithium dendrite could be effectively inhibited. GPE can be applied in high-performance lithium batteries.
研究领域:
材料科学
·
电化学
✓ 已验证
DOI
高影响因子
ACS Nano
·
2024
·
IF 15.8
Ming Yang,Kaiqi Yang,Yujing Wu,Zhixuan Wang,Tenghuan Ma,Dengxu Wu,Li Yang,Jieru Xu,Pushun Lu,Jian Peng,Zhiwen Jiang,Xiang Zhu,Qifa Gao,Fuqiang Xu,Liquan Chen,Hong Li,Fan Wu
The accelerated formation of lithium dendrites has considerably impeded the advancement and practical deployment of all-solid-state lithium metal batteries (ASSLMBs). In this study, a soft carbon (SC)–Li3N interface layer was developed with both ionic and electronic conductivity, for which the in situ lithiation reaction not only lithiated SC into LiC6 with good electronic/ionic conductivity but also successfully transformed the mixed-phase Li3N into pure-phase β-Li3N with a high ionic conductivity/ion diffusion coefficient and stability to lithium metal. The mixed conductive interface layer facilitates fast Li+ transport at the interface and induces the homogeneous deposition of lithium metal inside it. This effectively inhibits the formation of lithium dendrites and greatly improves the performance of the ASSLMB. The ASSLMB assembled with the SC–Li3N interface layer exhibits high areal capacity (15 mA h cm–2), high current density (7.5 mA cm–2), and long cycle life (6000 cycles). These results indicate that this interface layer has great potential for practical applications in high-energy-density ASSLMBs.
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）