Electrochemical properties of doped lithium titanate compounds and their performance in lithium rechargeable batteries

Shenouda, Atef Y.; Murali, K. R.

doi:10.1016/j.jpowsour.2007.10.061

Cited by 151 publications

(72 citation statements)

References 28 publications

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“…Nyquist plots of LVP/C and LVP@C/G and the equivalent circuit (inset). which is called Warburg diffusion [35,36]. From the EIS curves of the LVP/C and the LVP@C/G, it is found that the interception at the x axis for the LVP/C is much larger than that for the LVP@C/C, which illustrates the ohmic impedance of LVP@C/G decreased greatly due to the presence of graphene [27].…”

Section: Resultsmentioning

confidence: 99%

Li3V2(PO4)3@C/graphene composite with improved cycling performance as cathode material for lithium-ion batteries

Zhang

Wang

Cai

et al. 2013

Electrochimica Acta

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Section: Resultsmentioning

confidence: 99%

Li3V2(PO4)3@C/graphene composite with improved cycling performance as cathode material for lithium-ion batteries

Zhang

Wang

Cai

et al. 2013

Electrochimica Acta

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“…The most commonly studied metal oxide based anode that is also used in commercial lithium ion batteries is lithium titanate (LTO). The main problem with LTO is that it has a much lower capacity (~170 mAh/g) [32] than graphite. However, its plateau potential is much higher (~1.5 V vs. Li + /Li) [32] and would eliminate the possibility of lithium plating and dendrite formation.…”

Section: Introductionmentioning

confidence: 99%

“…The main problem with LTO is that it has a much lower capacity (~170 mAh/g) [32] than graphite. However, its plateau potential is much higher (~1.5 V vs. Li + /Li) [32] and would eliminate the possibility of lithium plating and dendrite formation. Although LTO can be paired with a high voltage cathode (≥4.8 V), its operating voltage in a full cell is typically less than 2.4 V [32].…”

Section: Introductionmentioning

confidence: 99%

Investigation of the Reversible Lithiation of an Oxide Free Aluminum Anode by a LiBH4 Solid State Electrolyte

et al. 2017

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Abstract:In this study, we analyze and compare the physical and electrochemical properties of an all solid-state cell utilizing LiBH 4 as the electrolyte and aluminum as the active anode material. The system was characterized by galvanostatic lithiation/delithiation, cyclic voltammetry (CV), X-ray diffraction (XRD), energy dispersive X-ray spectroscopy (EDS), Raman spectroscopy, electrochemical impedance spectroscopy (EIS), and scanning electron microscopy (SEM). Constant current cycling demonstrated that the aluminum anode can be reversibly lithiated over multiple cycles utilizing a solid-state electrolyte. An initial capacity of 895 mAh/g was observed and is close to the theoretical capacity of aluminum. Cyclic voltammetry of the cell was consistent with the constant current cycling data and showed that the reversible lithiation/delithiation of aluminum occurs at 0.32 V and 0.38 V (vs. Li + /Li) respectively. XRD of the aluminum anode in the initial and lithiated state clearly showed the formation of a LiAl (1:1) alloy. SEM-EDS was utilized to examine the morphological changes that occur within the electrode during cycling. This work is the first example of reversible lithiation of aluminum in a solid-state cell and further emphasizes the robust nature of the LiBH 4 electrolyte. This demonstrates the possibility of utilizing other high capacity anode materials with a LiBH 4 based solid electrolyte in all-solid-state batteries.

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“…The diameter of the semicircle stands for the charge-transfer resistance, and the oblique straight line is related to the Warburg impedance [24]. The impedance of the semicircles in the high frequency region correspond to the electrode and liquid electrolyte interface charge transfer process, and the straight line in the low frequency region can be expressed as the lithium ions' diffusion behavior in the oxide structure [25][26][27][28]. As shown from The lithium ion chemical diffusion coefficient can be calculated from the plot in the low-frequency region by using the following Eq.…”

Section: Electrochemical Propertiesmentioning

confidence: 99%

Synthesis of Spherical Silver-coated Li4Ti5O12 Anode Material by a Sol-Gel-assisted Hydrothermal Method

Huang

et al. 2017

Nanoscale Res Lett

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Ag-coated spherical Li 4 Ti 5 O 12 composite was successfully synthesized via a sol-gel-assisted hydrothermal method using an ethylene glycol and silver nitrate mixture as the precursor, and the influence of the Ag coating contents on the electrochemical properties of its was extensively investigated. X-ray diffraction (XRD) analysis indicated that the Ag coating does not change the spinel structure of Li 4 Ti 5 O 12 . The electrochemical impedance spectroscopy (EIS) analyses demonstrated that the excellent electrical conductivity of the Li 4 Ti 5 O 12 /Ag resulted from the presence of the highly conducting silver coating layer. Additionally, the nano-thick silver layer, which was uniformly coated on the particles, significantly improved this material's rate capability. As a consequence, the silver-coated micron-sized spherial Li 4 Ti 5 O 12 exhibited excellent electrochemical performance. Thus, with an appropriate silver content of 5 wt.%, the Li 4 Ti 5 O 12 /Ag delivered the highest capacity of 186.34 mAh g −1 at 0.5C, which is higher than that of other samples, and maintained 92.69% of its initial capacity at 5C after 100 cycles. Even at 10C after 100 cycles, it still had a capacity retention of 89.17%, demonstrating remarkable cycling stability. via a sol-gel-assisted hydrothermal method using ethylene glycol and a silver nitrate mixture as the precursor for the coating layer, which significantly improved the electronic conductivity and the electrochemical performance of Li 4 Ti 5 O 12 . 2. The spherical morphology could induce a large tap density and consequently enhance the volumetric energy density.

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Electrochemical properties of doped lithium titanate compounds and their performance in lithium rechargeable batteries

Cited by 151 publications

References 28 publications

Li3V2(PO4)3@C/graphene composite with improved cycling performance as cathode material for lithium-ion batteries

Li3V2(PO4)3@C/graphene composite with improved cycling performance as cathode material for lithium-ion batteries

Investigation of the Reversible Lithiation of an Oxide Free Aluminum Anode by a LiBH4 Solid State Electrolyte

Synthesis of Spherical Silver-coated Li4Ti5O12 Anode Material by a Sol-Gel-assisted Hydrothermal Method

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