EcoMat
·
2022
·Vol. 4
·期 5
·e12217
·
IF 12.213
Tuzhi Xiong,Yingxia Gao,Peng Huang,Yongchao Huang,Hao Yang,M-Sadeeq (Jie Tang) Balogun
Upon evaluating the pseudocapacitance contribution ( k 1 v ) of electrode materials, the exact capacity (also termed as actual pseudocapacity , k Q ) is usually ignored. However, there is a significant variation between k 1 v and k Q . Herein, we designed tunable in situ core-shell electrode materials to examine the variation between the k 1 v and k Q . Using nickel foam (NF) as the starting material, the internal structure of NF is systematically controlled via in situ strategy to obtain the optimized nickel oxide core–shell architectures (denoted NFNTO). Despite the directly oxidized NF (denoted NFO) exhibits a higher k 1 v (79.1%) than the NFNTO (47.6%), the k Q of NFNTO is ≈2.3 fold larger than NFO at the highest current density of 8.0 mA cm −2 . The higher k Q can be attributed to the integration of titanium that shortens the Li + diffusion pathway, boosts the diffusion co-efficient and improves the electronic conductivity towards achieving enhanced ionic transport.
✓ 已验证
产品关联
DOI
高影响因子
Nano Research
·
2023
·
IF 9.9
Wu Mengjun,Song Jiangping,Lei Jiaheng,Tang Haolin
Composite polymer electrolytes (CPEs) have attracted much attention for high energy density solid-state lithium-metal batteries owing to their flexibility, low cost, and easy scale-up. However, the unstable Li/CPE interface is always challengeable for the practical utilization of CPEs. Herein, a polymer interlayer containing K + prepared by ultraviolet (UV)-curing precursor solution is coated on Li surface to stabilize the interface between poly(vinylidene difluoride) (PVDF) composite electrolytes and Li anode. Benefiting from the physical barrier of the interlayer, the continuous decomposition of PVDF is restrained and the intimate contact between electrode and electrolyte is also achieved to reduce the interface impedance. Moreover, the added K + is utilized to further regulate smooth Li deposition. As a consequence, the symmetric Li∣Li cell with coated Li demonstrates steady cycling at 0.4 mAh·cm −2 and a high critical current density of 1 mA·cm −2 . The assembled Li∣LiFePO 4 cell presents outstanding cycling stability (capacity retention of 90% after 400 cycles at 1 C) and good rate performance. The associated pouch cell performs impressive flexibility and safety. This work provides a convenient strategy to achieve stable Li/PVDF interface for high-performance PVDF-based solid state Li metal batteries.
✓ 已验证
产品关联
DOI
高影响因子
JOURNAL OF ALLOYS AND COMPOUNDS
·
2021
·
IF 5.316
Jiahao Chen,Hong Zhang,Lin Yang,Hongzhu Chen,Junming Shao,Zhicheng Li
Lithium ion batteries (LIBs) based on solid state electrolytes have attracted much attention for their high safety and energy density . Li 29 Zr 9 Nb 3 O 40 powders as Li-ionic conductors were prepared using a sol-gel method in this work, and the related ceramics were sintered in air or in an oxygen-deficient atmosphere in which sample was covered with corundum crucible. All the sintered ceramics are consisted of orthorhombic phase. Li 29 Zr 9 Nb 3 O 40 ceramic sintered in oxygen-deficient atmosphere has conductivity of 1.03 × 10 −3 S cm −1 at room temperature and has ionic transference number of 0.9996, while the ceramic sintered in air has conductivity of 4.41 × 10 −5 S cm −1 . The influence of oxygen vacancy on the migration path of Li-ion was discussed. The migration paths of Li-ions between two kinds of Li 29 Zr 9 Nb 3 O 40 ceramics were simulated and visualized by method of bond valence site energy with VESTA software.
✓ 已验证
产品关联
DOI
高影响因子
CERAMICS INTERNATIONAL
·
2023
·
IF 5.2
Guoliang Xue,Zhiguo Wang,Jun Cao
In the search for dielectric material with high energy storage density, a ceramic system of 0.8Na 0.5 Bi 0.5 TiO 3 –0.2K 1- x Li x TaO 3 (NBT-KLT- x , x = 0.1–0.5) is proposed in this work. The addition of Li 2 CO 3 is conducive to the decrease of sintering temperature of ceramics. Moreover, the XRD diffraction data of sintered ceramics indicate that pure perovskite phase showing the pseudo-cubic structure can be achieved when x = 0.1–0.3 while the excessive addition of Li 2 CO 3 leads to the formation of pyrochlore phase. Based on the Rietveld refinement and Raman results, the Li + doping in the NBT-KLT- x solid solutions ( x = 0.1–0.3) can improve the phase content of P 4bm, induce the lattice expansion and structural change towards a higher-symmetry phase. TEM observation also demonstrates the reduction in the size of polar nanoregions. With increasing x from 0.1 to 0.5, both the oxygen vacancy concentration and grain size display a tendency to decrease first and then increase. For the x = 0.2 ceramics with the lowest oxygen vacancy concentration and grain size, the largest electrical breakdown strength and lowest polarization hysteresis are achieved, giving an excellent recoverable energy storage density of 4.86 J/cm 3 under 32 kV/mm, accompanied by a high efficiency of 90.46 %. Additionally, the recoverable energy density achieves a high level of ∼3.5 J/cm 3 and energy storage efficiency is larger than 80 % over 28–160 °C, suggesting the outstanding temperature stability.
✓ 已验证
产品关联
DOI
高影响因子
Nature Communications
·
2026
·
IF 18.1
Sun Chuangchao,Chen Linxiang,Hua Junyi,Zhang Shengpeng,Li Yong,Zhao Liyi,Cheng Hao,Ye Daixin,Zhang Haikuo,Wang Lianbang,Fan Xiulin
Fast Li + kinetics are essential for high energy lithium metal batteries, yet the factors governing these kinetics remain unclear. Here, we decipher a quantitative structure-kinetics relationship by demonstrating that polarizability dictates Li + desolvation and transport. Specifically, the inert solvents with low polarizability generate weak induced dipoles under interfacial electric fields, which keeps the structural integrity of anion-rich solvates. These intact solvates improve the Li + kinetics via coupling Li + hopping and electrostatic repulsion to anions, as evidenced by the linear relationship between polarizability and desolvation energy. Meanwhile, the induced more inorganic-rich solid-electrolyte interphase further accelerates the Li + kinetics. Accordingly, the tailored electrolyte enables Li | |LiNi 0.8 Co 0.1 Mn 0.1 O 2 cells to achieve a stable cycling (0.2 C charge/0.5 C discharge, 1 C = 200 mA g −1 based on the NCM811 positive electrode) with 95% capacity retention after 200 cycles at −35 °C and powers a 7.5-Ah lithium metal pouch cell (0.1 C charge/0.3 C discharge, 1 C = 200 mA g −1 based on the NCM811 positive electrode) with a specific energy of 541.6 Wh kg −1 (based on the full cell mass). This work decodes the polarizability-governed Li + kinetics and establishes practical electrolyte guidelines for realizing high energy lithium metal batteries.
✓ 已验证
产品关联
DOI
高影响因子
Nano Energy
·
2023
·
IF 17.6
Yining Li,Yi Li,Haoxin Li,Yang Gan,Wujie Qiu,Jianjun Liu
The Li-excess rocksalt materials have opened a vast new chemical space to develop low-cost and high-energy-density cathode materials for satisfying the rising market demand of rechargeable batteries. However, those materials suffer from capacity and voltage decay on cycling due to irreversible structural rearrangement. Quantitatively characterizing reversible capacity are decisive to collaboratively improve capacity and cycling stability, but very challenging to predict for experiencing complicated redox. A “state-accumulated charge-transfer gap” model is introduced to continuously accumulate electrochemical reversibility effect during the whole redox process . This is demonstrated through rational design and preparation of several representative compositions in the cation-disordered Li-Mn-Ti-O-F chemical space. Based on electrochemical tests and first-principles studies, we found that Li 1.2 Mn 0.6 Ti 0.2 O 1.67 F 0.33 with almost complete Mn 4+ oxidation states and a little anionic redox in the end of charge could achieve high capacity of 330 mAh g −1 in first cycle and 225 mAh g −1 after 20 cycles, which reaches the best comprehensive electrochemical performance in reported Li-rich materials. The present study opens a new avenue to design Li-rich cathode materials with high reversible capacity.
✓ 已验证
产品关联
DOI
高影响因子
SEPARATION AND PURIFICATION TECHNOLOGY
·
2023
·
IF 8.6
Xiaolei Cui,Guodong Kong,Shengchao Wei,Yuchen Cui,Pengyao Yu,Zixi Kang,Hailing Guo
Advanced ion transportation channels aided by charge and suitable aperture play a crucial role in achieving precise separation of ions. Here, we report a MOF composite membrane with electropositive surface and sub-nanometer-sized ion transport channels for efficient Li + /Mg 2+ separation. The membranes were fabricated using MOF “porous monomers” and trimesoyl chloride (TMC) through interfacial polymerization, and subsequently modified with amino-functionalized polyethyleneimine (PEI). The abundant porosity of the MOFs composite membrane includes the inner and the intergranular pores of MOF provided a rapid transport channel for Li + ions, and a superior Li + permeation rate of 0.68 mol m −2 h −1 (a 10 times enhancement compared to the currently leading MOF membranes). Moreover, the improved positively charged surface (from −78 mV to + 4 mV at pH = 7) and reduced mean pore diameter (from 1.13 nm to 0.8 nm) of the membrane caused a remarkable selectivity of 13.2 for Li + /Mg 2+ . The design concept of the above MOFs based membrane provides a novel approach for developing high-quality MOF composite membranes for improving Li + /Mg 2+ separation performance.
✓ 已验证
产品关联
DOI
高影响因子
Energy & Environmental Materials
·
2021
·Vol. 5
·期 2
·524-532
·
IF 15.122
Jun Zhao,Yongfu Tang,Qiushi Dai,Congcong Du,Yin Zhang,Dingchuan Xue,Tianwu Chen,Jingzhao Chen,Bo Wang,Jingming Yao,Ning Zhao,Yanshuai Li,Shuman Xia,Xiangxin Guo,Stephen J. Harris,Liqiang Zhang,Sulin Zhang,Ting Zhu,Jianyu Huang
Lithium (Li) penetration through solid electrolytes (SEs) induces short circuits in Li solid-state batteries (SSBs), which is a critical issue that hinders the development of high energy density SSBs. While cracking in ceramic SEs has been often shown to accompany Li penetration, the interplay between Li deposition and cracking remains elusive. Here, we constructed a mesoscale SSB inside a focused ion beam-scanning electron microscope (FIB-SEM) for in situ observation of Li deposition-induced cracking in SEs at nanometer resolution. Our results revealed that Li propagated predominantly along transgranular cracks in a garnet Li 6.4 La 3 Zr 1.4 Ta 0.6 O 12 (LLZTO). Cracks appeared to initiate from the interior of LLZTO beneath the electrode surface and then propagated by curving toward the LLZTO surface. The resulting bowl-shaped cracks resemble those from hydraulic fracture caused by high fluid pressure on the surface of internal cracks, suggesting that the Li deposition-induced pressure is the major driving force of crack initiation and propagation. The high pressure generated by Li deposition is further supported by in situ observation of the flow of filled Li between the crack flanks, causing crack widening and propagation. This work unveils the dynamic interplay between Li deposition and cracking in SEs and provides insight into the mitigation of Li dendrite penetration in SSBs.
✓ 已验证
DOI
高影响因子
NATURE
·
2021
·Vol. 592
·期 7855
·551-557
·
IF 49.962
Chi Xiwen,Li Malin,Di Jiancheng,Bai Pu,Song Lina,Wang Xiaoxue,Li Fei,Liang Shuang,Xu Jijing,Yu Jihong
Solid-state lithium (Li)–air batteries are recognized as a next-generation solution for energy storage to address the safety and electrochemical stability issues that are encountered in liquid battery systems 1 , 2 , 3 , 4 . However, conventional solid electrolytes are unsuitable for use in solid-state Li–air systems owing to their instability towards lithium metal and/or air, as well as the difficulty in constructing low-resistance interfaces 5 . Here we present an integrated solid-state Li–air battery that contains an ultrathin, high-ion-conductive lithium-ion-exchanged zeolite X (LiX) membrane as the sole solid electrolyte. This electrolyte is integrated with cast lithium as the anode and carbon nanotubes as the cathode using an in situ assembly strategy. Owing to the intrinsic chemical stability of the zeolite, degeneration of the electrolyte from the effects of lithium or air is effectively suppressed. The battery has a capacity of 12,020 milliamp hours per gram of carbon nanotubes, and has a cycle life of 149 cycles at a current density of 500 milliamps per gram and at a capacity of 1,000 milliamp hours per gram. This cycle life is greater than those of batteries based on lithium aluminium germanium phosphate (12 cycles) and organic electrolytes (102 cycles) under the same conditions. The electrochemical performance, flexibility and stability of zeolite-based Li–air batteries confer practical applicability that could extend to other energy-storage systems, such as Li–ion, Na–air and Na–ion batteries.
✓ 已验证
产品关联
DOI
PubMed
高影响因子
JOURNAL OF THE ELECTROCHEMICAL SOCIETY
·
2021
·Vol. 167
·期 16
·160557
·
IF 4.316
Guange Wang,Tong Wu,Borui Liu,Shanshan Gong,Qing Huang,Yuefeng Su,Feng Wu,Ryan M. Kelly
Considering that lithium-ion battery (LIB) is still an indispensable and important component of energy storage materials, the sustainable post-processing of spent LIBs in labs or enterprises becomes a tricky problem. Herein, a novel scheme is proposed to dissert the recycling of the spent LIBs. The LIB is recycled into Li(Ni0.9Co0.05Mn0.05)O2 (NCM90) cathode material with high specific capacity by introducing an innovative hydrometallurgy-coprecipitation treatment method. The spent LiCoO2 (LCO) cathode material is firstly leached by sulfuric acid, and the leachate is gradient used as the raw materials to resynthesize high-nickel NCM material by adjusting the leachate dosage to about 50%. Interestingly, when the dosage exceeds 50%, the crystal structure aggravates, and Li+/Ni2+ mixing improves. The specific capacity of regenerated battery is 181.4 mAh g−1 at 0.5 C (1 C = 200 mAh g−1) and the capacity retention achieves 93.2% after 100 cycles. The reasons can be attributed to the cation mixing and crystal strucure and the small amount of Al doping. In conclusion, this combined method recycling of LIBs has huge potential value for environment protection and production.
✓ 已验证
产品关联
DOI
高影响因子
Materials
·
2020
·Vol. 13
·期 20
·4611
·
IF 3.057
Wen Ding,Xiaozhong Wu,Yanyan Li,Shuo Wang,Shuping Zhuo
The biomass-based carbons anode materials have drawn significant attention because of admirable electrochemical performance on account of their nontoxicity and abundance resources. Herein, a novel type of nickel-embedded carbon material (nickel@carbon) is prepared by carbonizing the dough which is synthesized by mixing wheat flour and nickel nitrate as anode material in lithium-ion batteries. In the course of the carbonization process, the wheat flour is employed as a carbon precursor, while the nickel nitrate is introduced as both a graphitization catalyst and a pore-forming agent. The in situ formed Ni nanoparticles play a crucial role in catalyzing graphitization and regulating the carbon nanocrystalline structure. Mainly owing to the graphite-like carbon microcrystalline structure and the microporosity structure, the NC-600 sample exhibits a favorable reversible capacity (700.8 mAh g−1at 0.1 A g−1after 200 cycles), good rate performance (51.3 mAh g−1at 20 A g−1), and long-cycling durability (257.25 mAh g−1at 1 A g−1after 800 cycles). Hence, this work proposes a promising inexpensive and highly sustainable biomass-based carbon anode material with superior electrochemical properties in LIBs.Keywords:biomass-based carbon;nickel nanoparticles;lithium-ion batteries;anode material
✓ 已验证
产品关联
DOI
PubMed
高影响因子
JOURNAL OF ALLOYS AND COMPOUNDS
·
2020
·
IF 4.65
Wenhui Zhu,Ali Reza Kamali
A facile and fast molten salt strategy is developed, for the first time, to synthesis sodium dimolybdate (Na 2 Mo 2 O 7 ). The process is based on a thermodynamically favorable reaction between naturally available precursors MoS 2 and NaCl to produce Na 2 Mo 2 O 7 as well as a gas phase that leaves the system. The product is characterized by electron microscopy and energy-dispersive X-ray spectroscopy (EDX) as well as X-ray diffraction (XRD) and Raman spectroscopy . The prepared Na 2 Mo 2 O 7 in combination with molten salt-synthesized graphene nanosheets is examined as anode material for Li-ion batteries, exhibiting an interesting performance, with the first cycle discharge and charge capacities of 1363 and 857 mAh g −1 , respectively, at 100 mA g −1 . A reversible Li storage capacity of 506 mAh g −1 can still be observed after 100 cycles. The results are rather interesting towards the development of low-cost and high-performance Na 2 Mo 2 O 7 anode materials.
✓ 已验证
产品关联
DOI
高影响因子
危险品化学品经营许可证（带存储）