CHEMICAL ENGINEERING JOURNAL
·
2023
·
IF 15.1
Tong Wen,Yunliang Zhao,Xingwen Wang,Licai Chen,Renbo Gao,Shutong Wang,Tingting Zhang
Recent innovations have created various two-dimensional membranes to break the Li + /Mg 2+ selectivity limit of traditional separation membranes. However, the simultaneous achievement of ultrafast transport and high selectivity is still below the theoretical prediction. Herein, for overcoming these shortcomings, the two-dimensional montmorillonite membrane (2D MMT membrane) consisting of sulfonated polyvinyl alcohol (SPVA), ethylene glycol (EG), and polyacrylamide (PAM) is proposed based on the design of porous 2D nanochannels. It is found that the SPVA can effectively improve the membrane stability, but will densify the channel, and prevent ion transport. When the appropriate EG is included in the membrane component, the transport rate of Li + can be increased from 0.29 mol h −1 m −2 to 0.56 mol h −1 m −2 . However, because the transport of Mg 2+ needs to overcome the high dehydration energy barrier, the J Mg2+ changes little, hence increases in S Mg 2+ Li + from 4.1 to 7.3. In addition, the selectivity regulation of PAM can be further integrated, and the permselectivity of the membrane is improved to 9.2 due to the strong selective coordination of amide groups to Mg 2+ . This novel strategy provides a valuable reference for developing high-performance 2D MMT membranes, which can also promote the application of 2D membranes in the Li + /Mg 2+ separation.
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Energy Storage Materials
·
2023
·
IF 20.4
Yuhan Ma,Rui Zhang,Liu Wang,Jiaxin Wu,Biao Chen,Yan Yu,Lingyun Li,Fang He,Chunsheng Shi,Naiqin Zhao,Chunnian He,Andrew Barnabas Wong
Polyethylene oxide (PEO)-based solid-state electrolyte (SSE) is attractive due to its excellent adhesion with electrodes and good processability. However, lithium dendrites easily penetrate PEO because of its soft nature, which results in inferior battery performance and safety issues. Here, a novel self-healing PEO-based SSE is prepared by incorporating 2 wt% amorphous three-dimensional carbon (3DC). This SSE possesses suitably low electronic conductivity for battery applications (on the order of 10 −9 S cm −1 ), which is five orders of magnitude lower than its ionic conductivity (10 −4 S cm −1 ) at 60 °C. In addition, the improved fluidity and strong adhesion between the 3DC and the PEO matrix contribute to the self-healing ability of SSE, which will repair the cracks of SSE formed during battery cycling. Moreover, this SSE shows enhanced ionic and thermal conductivities and mechanical strength, suppressing the formation and growth of lithium dendrites. As a result, this SSE exhibits excellent electrochemical stability, achieving 5000 h of stable cycles in lithium symmetric cell (0.1 mA cm −2 , 0.1 mAh cm −2 ) and 850 long-term stable cycles for the LFP//Li full cell at 1 C (0.31 mA cm −2 ).
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JOURNAL OF ELECTRONIC MATERIALS
·
2023
·Vol. 52
·期 10
·6613-6624
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IF 2.1
Gong Huixia,Wang Liqin,Wang Jianshe,Liu Qingchao
Lithium-oxygen (Li-O 2 ) batteries have become one of the most promising next-generation energy storage systems due to their high theoretical specific capacity. However, Li-O 2 batteries still face the problem of high charging voltage due to incomplete decomposition of discharge products. Here, a nitrogen-doped hollow spherical carbon composite containing Ni/Co nanoparticles was prepared by hydrothermal and pyrolysis strategies, and used as positive catalyst for Li-O 2 batteries to adjust the morphology of the discharge product. The porous hollow carbon sphere provides sufficient space for the storage of discharge products. Nitrogen-doped carbon nanospheres can change the local charge density, improve the electron transfer performance, and reduce the resistivity of carbon nanospheres. In addition, the abundant M-N x active groups enhance the affinity of the positive electrode to the reaction intermediates, thus regulating the morphology of the discharge product Li 2 O 2 . Benefiting from the above synergistic advantages, the electrochemical performance of the Li-O 2 battery including round-trip efficiency, discharge capacity, and cycling stability is greatly improved. Graphical Abstract
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Journal of the American Chemical Society
·
2023
·
IF 15
Feng Li,Xiaobin Cheng,Gongxun Lu,Yi-Chen Yin,Ye-Chao Wu,Ruijun Pan,Jin-Da Luo,Fanyang Huang,Li-Zhe Feng,Lei-Lei Lu,Tao Ma,Lirong Zheng,Shuhong Jiao,Ruiguo Cao,Zhi-Pan Liu,Hongmin Zhou,Xinyong Tao,Cheng Shang,Hong-Bin Yao
Solid electrolytes (SEs) are central components that enable high-performance, all-solid-state lithium batteries (ASSLBs). Amorphous SEs hold great potential for ASSLBs because their grain-boundary-free characteristics facilitate intact solid–solid contact and uniform Li-ion conduction for high-performance cathodes. However, amorphous oxide SEs with limited ionic conductivities and glassy sulfide SEs with narrow electrochemical windows cannot sustain high-nickel cathodes. Herein, we report a class of amorphous Li–Ta–Cl-based chloride SEs possessing high Li-ion conductivity (up to 7.16 mS cm–1) and low Young’s modulus (approximately 3 GPa) to enable excellent Li-ion conduction and intact physical contact among rigid components in ASSLBs. We reveal that the amorphous Li–Ta–Cl matrix is composed of LiCl43–, LiCl54–, LiCl65– polyhedra, and TaCl6– octahedra via machine-learning simulation, solid-state 7Li nuclear magnetic resonance, and X-ray absorption analysis. Attractively, our amorphous chloride SEs exhibit excellent compatibility with high-nickel cathodes. We demonstrate that ASSLBs comprising amorphous chloride SEs and high-nickel single-crystal cathodes (LiNi0.88Co0.07Mn0.05O2) exhibit ∼99% capacity retention after 800 cycles at ∼3 C under 1 mA h cm–2 and ∼80% capacity retention after 75 cycles at 0.2 C under a high areal capacity of 5 mA h cm–2. Most importantly, a stable operation of up to 9800 cycles with a capacity retention of ∼77% at a high rate of 3.4 C can be achieved in a freezing environment of −10 °C. Our amorphous chloride SEs will pave the way to realize high-performance high-nickel cathodes for high-energy-density ASSLBs.
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ACS Applied Materials & Interfaces
·
2023
·
IF 9.5
Yuqing Bai,Le Wei,Yuebin Lian,Zhihe Wei,Daqi Song,Yanhui Su,Xiong Zhu,Wenxuan Huo,Jian Cheng,Yang Peng,Zhao Deng
Li-CO2 batteries that integrate energy storage with greenhouse gas fixation have received a great deal of attention in the pursuit of carbon neutrality. However, cyclic accumulation of the insulative and insoluble Li2CO3 on the cathode surface severely restrains the battery cyclability, especially under a high depth of discharge/charge. Herein, we design and fabricate a microreactor-type catalyst by embedding Ru nanoparticles into the shells of mesoporous hollow carbon spheres. We show that both the hollow cavity and mesoporous shell are indispensable for concertedly furnishing a high activity to catalyze reversible Li2CO3 formation/decomposition. This unique structure ensures that the Ru sites masked by exterior Li2CO3 deposits during charging can resume the redox process of discharge by working with the prestored electrolyte to establish an inner reaction path. The thus fabricated Li-CO2 batteries demonstrate remarkable cyclability of 1085 cycles under 0.5 Ah g–1 and 326 cycles under 2 Ah g–1 at 1 A g–1, outshining most of the literature reports. This study highlights a smart catalyst design to boost the reversibility and cyclability of Li-CO2 batteries through an “in & out” strategy.
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ACTA MATERIALIA
·
2023
·
IF 9.4
Ruineng Ruan,Haibo Xiao,Wenjing Dong,Zhanghong Yu,Xunying Wang,Baoyuan Wang,Chen Xia,Hao Wang
Fast ionic transportation is in high demand for developing low-temperature solid oxide fuel cells (LT-SOFCs). Facing this challenge, a new H + /O 2− /Li + triple conductor is designed in this study from a lithium-metal oxide, spinel Li 4 Ti 5 O 12 (LTO). First-principle calculation based on density functional theory (DFT) reveals the proton transport barrier in LTO can be as low as 0.37 eV while the barrier for oxygen ion transportation is 0.94 eV. Using the designed LTO as the electrolyte and a typical cathode of lithium-ion battery, LiNi 0.8 Co 0.15 Al 0.05 O 2-δ , as the symmetrical electrodes, an all-lithium-metal-oxides-based LT-SOFC is constructed. High performance is achieved by the SOFC at 550–425 °C, i.e. 625 mW cm −2 at 550 °C, and a low activation energy of 0.60 eV is found with respect to the ionic conductivity of LTO at 550–475 °C. Further study confirms the dual O 2− /H + conduction of LTO via the application of proton and oxygen ion filters as well as the transference number test. Additionally, particular attentions are paid to the transport behavior of Li + in the cell via a charging process study and from XRD results. The possible contribution of triple conduction on fuel cell performance is discussed. This work demonstrates the great promise of triple H + /O 2− /Li + conducting lithium-metal oxides for LT-SOFC electrolyte development.
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DESALINATION
·
2023
·
IF 9.9
Ning Han,Yifei Li,Haisen Peng,Ruize Gao,Qiongqiong He,Zhenyong Miao,Keji Wan
With the continuous development of the global society, people's demand for lithium is increasing. Recovering valuable lithium from waste lithium-ion batteries and fly ash is essential for environmental protection and energy saving. We have developed a new imprinted capacitance deionization technology (N@Li + -IPDI), which can selectively recover lithium ion from acidic solution (pH = 2) under complex environment. The recovery capacity of N@Li + -IPDI electrode material was up to 20.26 mg/g. Separation of Li + from Na + , K + , and Al 3+ was achieved based on the size effect. Separation from Mg 2+ was due to the higher hydration energy of Mg 2+ (1940 kJ/mol) than Li + (510 kJ/mol). After 5 regeneration cycles, recovery effect of N@Li + -IPDI was 93.42 % of original. Through density functional theory (DFT) modeling, bond length of Li + -O was 2.04–2.05 Å, and adsorption energy of 2H12C4-Li + (−33.66 Kcal/mol) was the largest among the five ions. In addition, energy and structure of deprotonation process were studied, and the energy required for deprotonation was 6.33 kJ/mol, which was the reason Li + adsorption is difficult in acidic environment. This research provides a new green ion recovery technology with excellent selectivity , high adsorption and conductivity for Li + recovery in acid solution, to meet the challenge of growing demand for lithium.
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CORROSION SCIENCE
·
2023
·
IF 8.3
Mingyong Jia,Fei Chen,Xipeng Tan,Yaling He,Yueqi Wu,Qiang Shen
The high-temperature corrosion behavior of an AlN/Mo functionally graded material (FGM) under the Li/LiF-LiCl-LiBr vapor has been investigated. It is suggested that the Li vapor diffuses along the AlN and AlN/Mo grain boundaries and enters the interior of adjacent AlN grains, leading to the disintegration of AlN grains and subsequent failures. The 3D Mo networks are barely corroded, thus preventing cracking that may occur due to the inconsistent deformation inside the FGM. This work unravels the high-temperature corrosion mechanisms for the AlN/Mo FGM. Meanwhile, the operating temperature threshold for the liquid metal batteries employing Mo/AlN/Mo seals is determined to be ∼ 600 °C.
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高影响因子
DESALINATION
·
2023
·
IF 9.9
Qingyi Wang,Yuyang Wang,Yangxiang Huang,Huimin Wang,Yang Gao,Mingyu Zhao,Longdou Tu,Lixin Xue,Congjie Gao
To effectively separate Mg 2+ and Li + from high Mg 2+ /Li + ratio salt lake brine, positively charged thin film composite polyamide (TFC-PA) nanofiltration (NF) membranes were prepared by the interface polymerization involving polyethyleneimine (PEI) with benzenetricarbonyl chloride (TMC). In this work, the structures and performances of PEI based TFC-PA NF membrane prepared on polysulfone (PSF) ultrafiltration substrates from the normal interface polymerization process PSF(NIP), was compared with those on the same substrates from the reverse-phase interface polymerization (RIP) process PSF(RIP), and those on polyethylene substrates from RIP process PE(RIP). Results showed that PSF(RIP) showed improved Mg 2+ /Li + separation factor S Li/Mg from PSF(NIP) with an increased surface positive charge, but with greatly reduced water flux values due to reduced surface roughness , increased surface hydrophobicity , and decreased MWCO Stokes pore radius. PE(RIP) NF membrane showed not only higher Mg 2+ /Li + separation factor S Li/Mg , but also higher water flux values due to increased surface roughness, decreased PA cross-linking degree, reduced PA separation layer thickness, and increased MWCO Stokes pore radius. PE(RIP) NF membrane also showed high rejection rates to a variety of divalent metal salts with high separation factors S Li/Mg of 40–49, high brine permeability values of 10.5 L·m −2 ·h −1 ·bar −1 , and excellent chemical and operational stability.
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ELECTROCHIMICA ACTA
·
2023
·
IF 6.6
Xiaotong Liu,Qiang Weng,Tao Liu,Zhiyuan Tang,Haoqing Tang
Li 2 ZnTi 3 O 8 (LZTO) has been highlighted as a promising active anode material for rechargeable lithium-ion batteries, but it suffers from a low high-rate capacity due to the sluggish Li-ion diffusion kinetics and inevitable consumption of Li + due to side reactions at the electrode/electrolyte interface. In this study, using Li 3 PO 4 as a lithium ion conductor and interface modifier, the crystal structure and electrochemical properties of LZTO are systematically studied and confirm that it is a faster lithium ion conductivity. Li 3 PO 4 not only accelerates Li-ion transport and increases diffusion paths, but also exhibits interfacial stability at high temperatures. Due to these advantages, the LZTO electrode containing the Li 3 PO 4 coating layer exhibits significantly improved electrochemical performance. The new Li 3 PO 4 coated LZTO electrode shows a large discharge specific capacity of 158.9 mAh g − 1 and a high capacity retention of 99% is obtained after 200 cycles at a rate of 5.0 A g − 1 and combined with cycle stability. Furthermore, the Li 3 PO 4 coated LZTO electrode also exhibits excellent low electrode polarization and high temperature long cycling performance for 500 cycles at temperatures up to 70 °C.
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JOURNAL OF ALLOYS AND COMPOUNDS
·
2022
·
IF 6.371
Chongyang Zhou,Han Sun,Qian Wang,Jakob B. Grinderslev,Dan Liu,Yigang Yan,Torben R. Jensen
Designing solid electrolytes for all-solid-state lithium batteries that can be compatible with high-voltage cathodes is challenging. Here we report that the nanocomposite Li 2 B 12 H 12 -Al 2 O 3 mechano-chemically treated for 120 h achieves an electrochemical stability window up to ∼ 3.8 V owing to the interfacial interaction via B-O bonds and a high lithium ionic conductivity , σ(Li + ) = 2.73 × 10 −5 S cm −1 at 30 °C. Moreover, this electrolyte shows high compatibility with the lithium metal anode as demonstrated by stable Li plating/stripping for 300 cycles. These electrolyte properties enable the first demonstration of a 3.8 V all-solid-state battery In 1.3 Li 0.3 |Li 2 B 12 H 12 -Al 2 O 3 (25 vol%)|LiNi 0.8 Co 0.1 Mn 0.1 O 2 (NCM811) operating for 120 cycles with a rate of 0.2 C and at 30 °C, with a reversible specific capacity of 77.5 mAh g −1 and Coulombic efficiency of 99.8 %. The results demonstrate the potential of hydroborates as electrolyte for all-solid-state lithium batteries.
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RSC Advances
·
2019
·Vol. 9
·期 41
·23607-23613
·
IF 3.049
Hao Wen,Wenbin Kang,Xingang Liu,Wenjuan Li,Liping Zhang,Chuhong Zhang
Free-standing graphene-based composite paper electrodes with various active materials have attracted tremendous interest for next-generation lithium-ion batteries (LIBs) due to advantages such as their light weight, excellent mechanical flexibility, and superior electrochemical performance. However, despite its high theoretical energy density, SnS2 is rather difficult to composite with the graphene paper, because conventional reduction procedures for graphene oxide (GO) induce either decomposition or oxidation of SnS2. Herein, a novel solid/gas two-phase interface hydrothermal process is reported to fabricate flexible free-standing SnS2/graphene nanocomposite papers (SGP) assisted by a reducing and stabilizing agent thioacetamide aqueous solution. Such hydrothermal process not only successfully reduces SnS2/graphene oxide paper (SGOP) to SGP, but more importantly, keeps intact the paper configuration as well as the phase stability of SnS2. The as-prepared SGP electrode exhibits high reversible discharge capacity, outstanding cyclic stability and rate capability, which can be attributed to the synergistic effect of the conductive and flexible graphene matrix for accommodation of the volumetric changes of SnS2 upon cycling and the planar SnS2 nanospacers between the graphene layers introducing nanopores for penetration of electrolyte and inhibition of graphene nanosheets restacking. This report demonstrates a new strategy for more active materials with promising lithium storage properties joining the flexible graphene-based paper electrode family.
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