MACROMOLECULAR CHEMISTRY AND PHYSICS
·
2023
·Vol. 224
·期 8
·2200448
·
IF 2.5
Yiyin Yang,Kangzhou Xie,Donglin Tang
Alcoholysis of bisureas (BUs) would be of great potential among the non-isocyanate routes for preparing polyurethanes, if the issue of the high melting temperature and the poor solubility for BUs can be solved. In this study, it is proposed to introduce Li salt to assist the melting of BUs via a eutectic system. It is found that the melting point of BUs indeed can be reduced to 170 °C or even lower by adding 40 mol% of LiCl or LiBr. In the polymerizations of BUs with diols, it is found that ZnO nanoparticles (30 ± 10 nm) are the most efficient catalyst in the catalyst screening study. Four polyurethanes are successfully synthesized and the glass transition temperature of them is detected to be 34–45 °C. PU1010 is tougher than other polymers so that it is able to be molded. The Young's modulus of PU1010 is 195.1 MPa, while the strength and the elongation at break are 36.4 MPa and 280%, respectively. The toughness calculated is 67.3 J cm −3 . This Li salt-assisted melting strategy not only realizes the synthesis of polyurethanes through alcoholysis of BUs, but can also be extended to the synthesis of other high performance polymers.
✓ 已验证
产品关联
DOI
高影响因子
Journal of Energy Chemistry
·
2022
·
IF 13.599
Junbo Zhang,Haikuo Zhang,Ruhong Li,Ling Lv,Di Lu,Shuoqing Zhang,Xuezhang Xiao,Shujiang Geng,Fuhui Wang,Tao Deng,Lixin Chen,Xiulin Fan
Passivation by the inorganic-rich solid electrolyte interphase (SEI), especially the LiF-rich SEI, is highly desirable to guarantee the durable lifespan of Li metal batteries (LMBs). Here, we report a diluent with the capability to facilitate the formation of LiF-rich SEI while avoiding the excess consumption of Li salts. Dissimilar to most of reported inert diluents, heptafluoro-1-methoxypropane (HM) is firstly demonstrated to cooperate with the decomposition of anions to generate LiF-rich SEI via releasing F-containing species near Li surface. The designed electrolyte consisting of 1.8 M LiFSI in the mixture of 1,2-dimethoxyethane (DME)/HM (2:1 by vol.) achieves excellent compatibility with both Li metal anodes (Coulombic efficiency ∼ 99.8%) and high-voltage cathodes (4.4 V LiNi 0.8 Mn 0.1 Co 0.1 O 2 (NMC811) and 4.5 V LiCoO 2 (LCO) vs Li + /Li). The 4.4 V Li (20 μm)||NMC811 (2.5 mA h cm −2 ) and 4.5 V Li (20 μm)||LCO (2.5 mA h cm −2 ) cells achieve capacity retentions of 80% over 560 cycles and 80% over 505 cycles, respectively. Meanwhile, the anode-free pouch cell delivers an energy density of ∼293 W h kg −1 initially and retains 70% of capacity after 100 deep cycles. This work highlights the critical impact of diluent on the SEI formation, and opens up a new direction for designing desirable interfacial chemistries to enable high-performance LMBs.
✓ 已验证
产品关联
DOI
高影响因子
JOURNAL OF POWER SOURCES
·
2023
·
IF 9.2
Xinjing Huang,Mengran Wang,Qiyu Wang,Qingyuan Dong,Bo Hong,Jie Li,Yanqing Lai
Lithium (Li) metal anode is the most promising anode for next-generation high-energy-density batteries due to the high theoretical specific capacity and the lowest redox potential . However, the uncontrollable growth of lithium dendrite and infinite volume expansion limit the development of Li metal-based batteries (LMBs). Introducing functional additives into electrolytes is considered as one of the efficient and economical strategies to suppress the Li dendrite growth and relieve the volume effect. Nevertheless, single-functional electrolyte additives can hardly comprehensively enhance the electrochemical performance of LMBs. Herein, boron-based anion receptor Tris(hexafluoroisopropyl) Borate (THFPB) is introduced into the electrolyte to weaken the interaction between the solvent and lithium ions , which regulates the lithium-ion desolvation process and enhance Li + migration, resulting in the formation of smooth, dense, and rich-inorganic solid electrolyte interphase (SEI) film. Strikingly, with 2 wt % THFPB additive, the Li||Li cell shows an extremely long cycle life of 4200 h, and the Li||Cu cell affords a high Coulombic efficiency (CE) of 99.87 %. The THFPB-modified electrolyte shows superior universality, which enhances the cycling and rate performance of the Li||S and Li||LiFePO 4 cells. Generally, this work provides a new perspective on the selection of new functional additives to achieve a long cycling life Li metal battery with great performance.
✓ 已验证
产品关联
DOI
高影响因子
JOURNAL OF COLLOID AND INTERFACE SCIENCE
·
2023
·
IF 9.9
Jianxiong Xing,Luo Yan,Tao Chen,Zhicui Song,Zihao Wang,Yuchi Liu,Liujiang Zhou,Jingze Li
Lithium (Li)-rich ternary alloy, comprising a multi-alloy phase as the built-in three-dimensional (3D) framework and a Li metal phase as a reversible Li reservoir, is a promising high-energy–density anode for rechargeable Li metal batteries. The introduction of metal/metalloid components to the alloy can effectively regulate Li deposition and maintain the dimensional integrity of the Li anode. Herein, the lithium–copper–zinc (Li–Cu–Zn) ternary alloy, as a new type of alloy anode, is synthesized via a facile thermal melting method. The fully delithiated 3D scaffold comprised two Cu–Zn alloy phases named CuZn and CuZn 5 . These alloy phases exhibit higher lithiophilicity and structural stability than Li–Zn and Li–Cu alloys. Moreover, the CuZn phase is electrochemically inert, ensuring the geometric stability of the anode, while the CuZn 5 phase can readily undergo alloying reaction with Li to form the LiZn phase, thereby facilitating uniform Li nucleation and deposition. The hybridized multiphase alloy structure and specific energy storage mechanism of the Cu–Zn based alloy scaffold in the ternary alloy anode facilitate dendrite-free Li deposition and prolonged cycle lifetime. The Li metal full battery based on lithium iron phosphate (LiFePO 4 ) cathode exhibits high cycling stability with high-capacity retention of 95.4% after 1000 cycles at 1C.
✓ 已验证
产品关联
DOI
PubMed
高影响因子
JOURNAL OF CHEMICAL AND ENGINEERING DATA
·
2023
·
IF 2.6
Xudong Yu,Xia Feng,Shan Feng,Yun Peng,Ying Zeng
The solid–liquid equilibria of the quinary system Li+, K+, Mg2+//Cl–, B4O72––H2O at 323.2 K were investigated by the isothermal dissolution method. The solubility, refractive index, and density of the system were determined, and the corresponding space phase diagram, planar projection diagram, water content diagram, and density/refractive index vs composition diagrams saturated with MgB4O7 are constructed based on the experimental data. The result shows that there are double salts of lithium carnallite (LiCl·MgCl2·7H2O) and carnallite (KCl·MgCl2·6H2O) formed in the system. The space phase diagram consists of five invariant points, 16 isothermal solution curves, and eight crystalline regions (Li2B4O7·3H2O, K2B4O7·4H2O, KCl, MgB4O7·9H2O, KCl·MgCl2·6H2O, MgCl2·6H2O, LiCl·MgCl2·7H2O, LiCl·H2O). Under the saturation of salt MgB4O7, the crystalline region of Li2B4O7·3H2O is the largest in the planar projection diagram of this system, and the solubility of LiCl is the largest. A comparison of planar projection diagrams (under the saturation of salt MgB4O7) of the system at 273.2 and 323.2 K shows that the crystallization regions of Li2B4O7·3H2O, KCl·MgCl2·6H2O, LiCl·MgCl2·7H2O, and LiCl·H2O increase along with the temperature, while those of K2B4O7·4H2O and KCl decrease. The results show that low temperature is conducive to the extraction of potassium in the form of K2B4O7·4H2O and KCl and has less entrainment loss; high temperature is beneficial to the precipitation of Li2B4O7·3H2O.
✓ 已验证
产品关联
DOI
高影响因子
JOURNAL OF ALLOYS AND COMPOUNDS
·
2023
·
IF 6.2
Weixue Yang,Jiaqi Zhao,Zhen Li,Jiayu Xin,Fei Li,Yu Wang
Introducing light energy into the charging/discharging process is an effective strategy to reduce the overpotential of Li−O 2 battery, which leads that the battery has higher energy conversion efficiency and better battery performance. However, the development has been hampered by the lack of suitable photocatalysts and cathode structure to accommodate the insoluble Li 2 O 2 . In order to overcome the aforementioned difficulties, a bifunctional photocatalyst α-Fe 2 O 3 /SnO 2 (FS) heterojunction was designed as the cathode to improve the charging/discharging overpotentials simultaneously. The photogenerated electrons and holes from FS participated in the oxygen reduction reaction (ORR) and oxygen revolution reaction (OER) under illumination, giving rise to an ultra-low charging/discharging overpotential of 0.01 V (energy efficiency up to 99.7%), which improved the electrochemical reaction kinetics of the Li−O 2 battery strikingly. In addition, the FS cathode exhibited excellent cycle stability under light (the battery energy efficiency can still maintain 80% after 252 cycles). The bifunctional catalyst designed in this paper has profoundly proved that the band engineering strategy can effectively utilize solar energy and provide important insights for understanding the mechanism of photo-assisted Li−O 2 battery.
✓ 已验证
产品关联
DOI
高影响因子
Small
·
2023
·Vol. 19
·期 49
·2303149
·
IF 13.3
Ping Li,Zhe Cheng,Jialu Liu,Lukang Che,Yingke Zhou,Enmin Xu,Xiaohui Tian,Zhongzhi Yuan
The electrode/electrolyte interfaces play an important role in the electrochemical reaction kinetics to alleviate the severe polarization and voltage hysteresis in lithium primary batteries. Herein, C 5 F 5 N is proposed as an electrolyte additive to tune the characteristics of the electrode/electrolyte interfaces. The Li/CF x primary battery with C 5 F 5 N additive exhibits an excellent discharge-specific capacity of 981.4 mAh g −1 (0.1 C), a remarkable high-rate capability of 598 mAh g −1 (15 C), and an outstanding energy/power density of 1068.7 Wh kg −1 /24362.5 W kg −1 . It also shows remarkable storage performance with 717.2 mAh g −1 at 0.1 C after storage at 55 °C for 2 months. The excellent performance of the Li/CF x batteries is closely related to the improved and stable Li 3 N/LiF-rich homogeneous interfaces induced by the C 5 F 5 N additive, which results in uniform distribution of Li + flux, facilitated electrochemical kinetics, and increased rate capability of Li/CF x battery. Therefore, C 5 F 5 N is expected to be a promising electrolyte additive, and the related electrode/electrolyte interface engineering provides an effective and facile strategy to increase the performance of the lithium primary battery.
✓ 已验证
产品关联
DOI
PubMed
高影响因子
ACS Sustainable Chemistry & Engineering
·
2022
·
IF 9.224
Meiqi Zhang,Luo Feng,Zhiyuan Zeng,Yijie Yang,Xiaoqi Sun
In this work, the Li/Zn-doped near-infrared reflective inorganic blue pigment YIn0.9–xMn0.1MxO3−δ (M = Li/Zn, x = 0–0.4) was synthesized by the high-temperature solid-state reaction method. The phase structures, morphologies, color properties and optical properties of synthetic pigments were characterized by X-ray diffractometer (XRD), scanning electron microscope (SEM), CIE1976 color space system, UV–vis-NIR spectrophotometer, and other instruments. All the doped samples have a hexagonal structure with space group P63cm (185). Compared with YIn0.9Mn0.1O3 (b* = −45.91), Li/Zn doped pigments have richer blue hues (b* is ranged from −29.59 to −55.14), which can meet the needs of public’s demands for blue hues. The NIR solar reflectance (R*) of all the samples are above 70%, and the highest R* with different doping concentrations can reach 86% (M = Li, x = 0.2), which is about 16% higher than YIn0.9Mn0.1O3. YIn0.9–xMn0.1MxO3−δ (M = Zn/Li, x = 0–0.4) are indicated to possess higher near-infrared solar reflectivity than other blue compounds, including commercial products. The surface temperature difference between the Li-doped (x = 0.2)/Zn-doped (x = 0.1) paints and commercial ultramarine paint can reach about 20 and 10 °C, respectively. The above properties ensure the potential applications of environmentally friendly YIn0.9–xMn0.1MxO3−δ pigments with a rich blue-hue in the field of energy-saving materials.
✓ 已验证
产品关联
DOI
高影响因子
CHEMICAL ENGINEERING JOURNAL
·
2022
·
IF 16.744
Jie Tang,Fuzhong Wu,Xinyi Dai,Jiawang Zhou,Huixia Pang,Xingyu Duan,Bo Xiao,Dongjia Li,Junliang Long
Silicon (Si)-based materials were considered to be the most promising anodes for next-generation lithium-ion batteries because of their high theoretical specific capacity. However, huge volume expansion during lithiation/de-lithiation processes and low electrical conductivity cause its rapid degradation. Most research has focused on the modification of Si, binders, and electrolytes, however, little attention has been paid to conductive additives, a small but extremely important component of lithium-ion battery materials. Herein, 2D MXene nanosheet owing to excellent electrical conductivity is used as the conductive additive to improve the capacity and cycle performance of Si anodes. As a result, the Si-M1 electrode demonstrates a discharge specific capacity of 2522.6 mAh/g at a current density of 1A/g after 100 cycles and 1867.1 mAh·g −1 at 5A/g. In this regard, good electrical contact was maintained, along with the inhabiting generation of dead Si attributed to the volume effect that was suppressed by MXene. Besides, the terminal groups of MXene are conducive to the formation of materials with good conductivity in solid electrolyte interphase. This new insight may contribute to promoting the application of Si anodes and promising extended to other anodes living with huge volume expansion.
✓ 已验证
产品关联
DOI
高影响因子
Chem
·
2022
·
IF 25.832
Zunchun Wu,Ruhong Li,Shuoqing Zhang,Ling lv,Tao Deng,Hao Zhang,Ruixin Zhang,Jiangjiang Liu,Shouhong Ding,Liwu Fan,Lixin Chen,Xiulin Fan
The stability of localized high-concentrated electrolytes (LHCEs) on the Li metal anode has been well established, but the understanding of its oxidation chemistry for high-voltage cathodes is unclear. Here, we demonstrate that the de-coordination between Li + and solvents defines the anodic stability of LHCEs, which can be finely tuned by the ambient diluents. After screening the possible diluents, we found that 2H,3H-decafluoropentane (HFC) satisfies the principle of relatively weak but sufficient interactions with solvation shell, thus strengthening the Li + coordination and offering electrolytes excellent antioxidant chemistry. The proposed HFC-LHCE enables practical Li metal batteries to realize >90% capacity retention with a Coulombic efficiency of 99.91% for >180 cycles under aggressive conditions (4.4 V 20-μm-Li||3.7-mAh cm −2 -LiNi 0.8 Mn 0.1 Co 0.1 O 2 and 4.5 V 20-μm-Li||4-mAh cm −2 -LiCoO 2 cells). This work presents guiding principles for improving electrolyte cathodic and anodic stability, which benefits the development of LHCEs and inspires the formulation of next-generation lithium batteries.
✓ 已验证
产品关联
DOI
高影响因子
Advanced Science
·
2022
·Vol. 9
·期 36
·2205069
·
IF 17.521
Yifan Wang,Zelong Qiao,Kexin Liu,Le Yu,Yingying Lv,Liyi Shi,Yin Zhao,Dapeng Cao,Zhuyi Wang,Shitao Wang,Shuai Yuan
The sluggish ion-transport in electrodes and low utilization of active materials are critical limitations of organic cathodes, which lead to the slow reaction dynamics and low specific capacity. In this study, the hierarchical tube is constructed by iron-hexaazatrinaphthalene tricarboxylic acid coordination polymer (Fe-HATNTA), using HATNTA as the self-engaged template to coordinate with Fe 2+ ions. This Fe-HATNTA tube with hierarchical porous structure ensures the sufficient contact between electrolyte and active materials, shortens the diffusion distance, and provides more favorable transport pathways for ions. When employed as the cathode for rechargeable Li-ion batteries, Fe-HATNTA delivers a high specific capacity (244 mAh g −1 at 50 mA g −1 , 91% of theoretical capacity), excellent rate capability (128 mAh g −1 at 9 A g −1 ), and a long-term cycle life (73.9% retention over 3000 cycles at 5 A g −1 ). Moreover, the Li + ions storage and conduction mechanisms are further disclosed by the ex situ and in situ characterizations, kinetic analyses, and theoretical calculations. This work is expected to boost further enthusiasm for developing the hierarchical structured metal-organic coordination polymers with superb ionic storage and transport as high-performance organic cathodes.
✓ 已验证
产品关联
DOI
PubMed
高影响因子
NANOTECHNOLOGY
·
2022
·Vol. 33
·期 42
·425601
·
IF 3.953
Wenwu Jiang,Yi Han,Yanhuai Ding
Electrospun PAN/PVdF-HFP membranes have the potential to be used as separators for Li-ion batteries owing to their good mechanical properties and high chemical stability. However, the application of PAN/PVdF-HFP separators has been hampered by their poor electrochemical performances. In this study, semi-aligned PAN/PVdF-HFP nanofiber separators have been fabricated by an electrospinning technology. Sepiolite and ZIF-67 co-modification was employed to enhance the physical properties of the PAN/PVdF-HFP separators. The test cells with the as-prepared composite separator showed better electrochemical performance than the commercial and raw PAN/PVdF-HFP separators.
✓ 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）