Iron Oxides as Anodic Materials in Li Rechargeable Batteries

1998 ◽  
Vol 548 ◽  
Author(s):  
M. J. Duncan ◽  
L. F. Nazar
Keyword(s):  
Solid Solution ◽  
Reversible Capacity ◽  
Rechargeable Batteries ◽  
Parent Material ◽  
Li Ion Batteries ◽  
Electronic Density ◽  
Open Framework ◽  
Li Ion ◽  
Cutoff Voltage ◽  
Oxide Matrix

ABSTRACTThe open framework material, CaFe204 and the isostructural solid solution phases, LiyCa1−(x+y)/2SnxFe2−xO4, where 0<y<x and O<x<0.6 have been evaluated as promising anodic materials in Li-ion batteries. These materials can be discharged to low potential, the end member CaFe2O4 attaining a discharge capacity of 800 mAh/g at a cutoff voltage of 50 mV. The capacity is enhanced on substitution of Fe3+, for Sn4+ in the framework (920 mAh/g for the composition, Li0.6Ca0.4Sn0.6Fe1.404). On introducing Sn into the structure the reversible capacity is also substantially increased compared with the parent material. Although there is a large irreversible component to the redox process during first discharge-charge, the materials can sustain a stable reversible capacity of >600 mAh/g within the voltage window of 3.0-0.005 V. The profile of the electronic density plots suggest there is no phase separation to Li/Sn alloy phases on reduction, but rather a lithium-rich, oxygen deficient Sn/Fe/oxide matrix is formed.

Zn0.5Co0.5O Solid Solution Nanoparticles with Durable Life for Rechargeable Lithium-ion Batteries

Nano LIFE ◽  
2014 ◽  
Vol 04 (04) ◽  
pp. 1441015 ◽  
Author(s):  
Linlin Wang ◽  
Daoli Zhao ◽  
Min Zhang ◽  
Caihua Wang ◽  
Kaibin Tang ◽  
...  
Keyword(s):  
Solid Solution ◽  
Particle Size ◽  
Energy Storage ◽  
Average Particle Size ◽  
Rate Capability ◽  
Lithium Ion ◽  
Reversible Capacity ◽  
Average Particle ◽  
Li Ion Batteries ◽  
Li Ion

Zn 0.5 Co 0.5 O solid solution materials have been extensively studied for possible spintronic applications, however, there are only a few reports using Zn 0.5 Co 0.5 O nanostructures for energy storage. Here, we report the preparation of Zn 0.5 Co 0.5 O nanoparticles with the average particle size 10 nm and their application as anode material for rechargeable Li -ion batteries (LIBs). Electrochemical measurements demonstrate that the Zn 0.5 Co 0.5 O solid solution nanoparticles deliver a stable reversible capacity of 309 mA h g-1 up to 250 cycles at 1 C rate. These results show higher-rate capability and better cycle durability compared with those of the reported ZnO or ZnO -based anodes.

Optimized electron occupancy of solid-solution transition metals for suppressing the oxygen evolution of Li2MnO3

2021 ◽  
Vol 9 (14) ◽  
pp. 9337-9346
Author(s):  
Erhong Song ◽  
Yifan Hu ◽  
Ruguang Ma ◽  
Yining Li ◽  
Xiaolin Zhao ◽  
...  
Keyword(s):  
Solid Solution ◽  
Energy Density ◽  
Transition Metals ◽  
Oxygen Evolution ◽  
High Energy ◽  
High Energy Density ◽  
Li Ion Batteries ◽  
Li Ion ◽  
Increasing Demand ◽  
Layered Cathodes

Li-rich layered cathodes based on Li2MnO3 have exhibited extraordinary promise to satisfy the rapidly increasing demand for high-energy density Li-ion batteries.

scholarly journals Novel core–shell structured Si/S-doped-carbon composite with buffering voids as high performance anode for Li-ion batteries

RSC Advances ◽  
2017 ◽  
Vol 7 (5) ◽  
pp. 2407-2414 ◽  
Author(s):  
Dan Shao ◽  
Inna Smolianova ◽  
Daoping Tang ◽  
Lingzhi Zhang
Keyword(s):  
Hydrothermal Method ◽  
High Performance ◽  
Reversible Capacity ◽  
Carbon Composite ◽  
Core Shell ◽  
Li Ion Batteries ◽  
Li Ion

Novel core–shell structured Si/S-doped carbon composite with buffering voids prepared by hydrothermal method and followed by carbonization and removal of template layer, exhibiting a reversible capacity of 664 mA h g−1 over 300 cycles.

Ternary Cu2SnS3 cabbage-like nanostructures: large-scale synthesis and their application in Li-ion batteries with superior reversible capacity

Nanoscale ◽  
2011 ◽  
Vol 3 (10) ◽  
pp. 4389 ◽  
Author(s):  
Baihua Qu ◽  
Hongxing Li ◽  
Ming Zhang ◽  
Lin Mei ◽  
Libao Chen ◽  
...  
Keyword(s):  
Large Scale ◽  
Reversible Capacity ◽  
Li Ion Batteries ◽  
Li Ion ◽  
Large Scale Synthesis

Unraveling the critical role of Zn-phyllomanganates in zinc ion batteries

2021 ◽  
Author(s):  
Boeun Lee ◽  
Jihwan Choi ◽  
Minseok Lee ◽  
Seulki Han ◽  
Minji Jeong ◽  
...  
Keyword(s):  
Critical Role ◽  
Redox Chemistry ◽  
Zinc Ion ◽  
Rechargeable Batteries ◽  
Viable Alternative ◽  
Li Ion Batteries ◽  
Aqueous Chemistry ◽  
Li Ion ◽  
Role Of Zn

Rechargeable batteries based on MnO2/Zn aqueous chemistry have emerged as a viable alternative to Li-ion batteries (LIB), owing to their low material cost, high safety, sustainable redox chemistry, and remarkable...

scholarly journals Synthesis and Electrochemical Performance of Graphene Wrapped SnxTi1−xO2Nanoparticles as an Anode Material for Li-Ion Batteries

2015 ◽  
Vol 2015 ◽  
pp. 1-10 ◽  
Author(s):  
Xing Xin ◽  
Xufeng Zhou ◽  
Tao Shen ◽  
Zhaoping Liu
Keyword(s):  
Solid Solution ◽  
Electrochemical Performance ◽  
Anode Material ◽  
Solution Method ◽  
Substitutional Solid Solution ◽  
Li Ion Batteries ◽  
Li Ion ◽  
The Stability ◽  
Ti Content ◽  
Aqueous Solution Method

Ever-growing development of Li-ion battery has urged the exploitation of new materials as electrodes. Here,SnxTi1-xO2solid-solution nanomaterials were prepared by aqueous solution method. The morphology, structures, and electrochemical performance ofSnxTi1-xO2nanoparticles were systematically investigated. The results indicate that Ti atom can replace the Sn atom to enter the lattice of SnO2to form substitutional solid-solution compounds. The capacity of the solid solution decreases while the stability is improved with the increasing of the Ti content. Solid solution withxof 0.7 exhibits the optimal electrochemical performance. The Sn0.7Ti0.3O2was further modified by highly conductive graphene to enhance its relatively low electrical conductivity. The Sn0.7Ti0.3O2/graphene composite exhibits much improved rate performance, indicating that theSnxTi1-xO2solid solution can be used as a potential anode material for Li-ion batteries.

High specific capacity and excellent stability of interface-controlled MWCNT based anodes in lithium ion battery

2011 ◽  
Vol 1313 ◽  
Author(s):  
Indranil Lahiri ◽  
Sung-Woo Oh ◽  
Yang-Kook Sun ◽  
Wonbong Choi
Keyword(s):  
Electrode Materials ◽  
Specific Capacity ◽  
High Energy ◽  
Rechargeable Batteries ◽  
Operating Voltage ◽  
Li Ion Batteries ◽  
High Specific Capacity ◽  
Capacity Degradation ◽  
Li Ion ◽  
Very High

ABSTRACTRechargeable batteries are in high demand for future hybrid vehicles and electronic devices markets. Among various kinds of rechargeable batteries, Li-ion batteries are most popular for their obvious advantages of high energy and power density, ability to offer higher operating voltage, absence of memory effect, operation over a wider temperature range and showing a low self-discharge rate. Researchers have shown great deal of interest in developing new, improved electrode materials for Li-ion batteries leading to higher specific capacity, longer cycle life and extra safety. In the present study, we have shown that an anode prepared from interface-controlled multiwall carbon nanotubes (MWCNT), directly grown on copper current collectors, may be the best suitable anode for a Li-ion battery. The newly developed anode structure has shown very high specific capacity (almost 2.5 times as that of graphite), excellent rate capability, nil capacity degradation in long-cycle operation and introduced a higher level of safety by avoiding organic binders. Enhanced properties of the anode were well supported by the structural characterization and can be related to very high Li-ion intercalation on the walls of CNTs, as observed in HRTEM. This newly developed CNT-based anode structure is expected to offer appreciable advancement in performance of future Li-ion batteries.

A novel anode comprised of C&N co-doped Co3O4 hollow nanofibres with excellent performance for lithium-ion batteries

2016 ◽  
Vol 18 (29) ◽  
pp. 19531-19535 ◽  
Author(s):  
Chunshuang Yan ◽  
Gang Chen ◽  
Jingxue Sun ◽  
Xin Zhou ◽  
Chade Lv
Keyword(s):  
Anode Materials ◽  
Lithium Ion ◽  
Reversible Capacity ◽  
Li Ion Batteries ◽  
Excellent Performance ◽  
Electrospinning Technique ◽  
High Reversible Capacity ◽  
Li Ion ◽  
Excellent Cycling Stability ◽  
Co Doped

C&N co-doped Co3O4 hollow nanofibres are prepared by combining the electrospinning technique and the hydrothermal method, which show a high reversible capacity and excellent cycling stability as anode materials for Li-ion batteries.

scholarly journals Operando Monitoring the Insulator-Metal Transition of LiCoO2

2021 ◽  
Author(s):  
Eibar Flores ◽  
Nataliia Mozhzhukhina ◽  
Ulrich Aschauer ◽  
Erik Berg
Keyword(s):  
Phase Transition ◽  
Solid Solution ◽  
Raman Spectroscopy ◽  
Dft Calculations ◽  
Active Material ◽  
Rate Capability ◽  
Li Ion Batteries ◽  
Two Phase ◽  
Insulator Metal Transition ◽  
Li Ion

LiCoO<sub>2</sub> (LCO) is one of the most-widely used cathode active materials for Li-ion batteries. Even though the material undergoes an electronic two-phase transition upon Li-ion cell charging, LCO exhibits competitive performance in terms of rate capability. Herein the insulator-metal transition of LCO is investigated by <i>operando</i> Raman spectroscopy complemented with DFT calculations and a newly-developed sampling volume model. We confirm the presence of a Mott insulator α-phase at dilute Li-vacancy concentrations (x > 0.87) that transforms into a metallic β-phase at x < 0.75. In addition, we find that the charge-discharge intensity trends of LCO Raman-active bands exhibit a characteristic hysteresis, which, unexpectedly, narrows at higher cycling rates. When comparing these trends to a newly-developed numerical model of laser penetration into a spatially-heterogeneous particle we provide compelling evidence that the insulator-metal transition of LCO follows a two-phase route at very low cycling rates, which is suppressed in favor of a solid-solution route at rates above 10 mA/g<sub>LCO</sub> (~C/10). The observations explain why LCO exhibits competitive rate capabilities despite being observed to undergo an intuitively slow two-phase transition route: a kinetically faster solid-solution transition route becomes available when the active material is cycled at rates >C/10. <i>Operando</i> Raman spectroscopy combined with sample volume modelling and DFT calculations is shown to provide unique insights into fundamental processes governing the performance of state-of-the-art cathode materials for Li-ion batteries.

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