Enhanced Electrochemical Performance of Li4Ti5O12 by Niobium Doping for Pseudocapacitive Applications

Chandrasekhar, Jinka; Dhananjaya, Merum; Hussain, O. M.; Mauger, A.; Julien, C.

doi:10.3390/micro1010004

Cited by 6 publications

(4 citation statements)

References 58 publications

(62 reference statements)

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“…Additionally, the high-temperature post-treatment is not desirable in terms of fabrication expenses. Conventional synthesis techniques include solid-state reaction (SSR) [ 25 , 43 , 44 , 45 , 46 , 47 , 48 , 49 ], hydrothermal [ 50 , 51 , 52 , 53 , 54 , 55 , 56 , 57 , 58 ], solvothermal method [ 59 , 60 ], sol–gel method [ 61 , 62 , 63 , 64 , 65 , 66 , 67 , 68 , 69 , 70 ], biphasic interfacial reaction [ 71 ], spray pyrolysis [ 72 , 73 , 74 , 75 , 76 , 77 , 78 ], molten-salt method [ 79 , 80 , 81 , 82 ], microwave heating method [ 83 , 84 ], template method [ 85 , 86 , 87 , 88 , 89 ], emulsion-gel process [ 90 …”

Section: Synthesis Methodsmentioning

confidence: 99%

“…Additionally, the hightemperature post-treatment is not desirable in terms of fabrication expenses. Conventional synthesis techniques include solid-state reaction (SSR) [25,[43][44][45][46][47][48][49], hydrothermal [50][51][52][53][54][55][56][57][58], solvothermal method [59,60], sol-gel method [61][62][63][64][65][66][67][68][69][70], biphasic interfacial reaction Scheme 1. Graphical abstract giving a brief introduction about the focus of the review paper.…”

Section: Synthesis Methodsmentioning

confidence: 99%

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Fabrication of Li4Ti5O12 (LTO) as Anode Material for Li-Ion Batteries

Julien,

Mauger

2024

Micromachines

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The most popular anode material in commercial Li-ion batteries is still graphite. However, its low intercalation potential is close to that of lithium, which results in the dendritic growth of lithium at its surface, and the formation of a passivation film that limits the rate capability and may result in safety hazards. High-performance anodes are thus needed. In this context, lithium titanite oxide (LTO) has attracted attention as this anode material has important advantages. Due to its higher lithium intercalation potential (1.55 V vs. Li+/Li), the dendritic deposition of lithium is avoided, and the safety is increased. In addition, LTO is a zero-strain material, as the volume change upon lithiation-delithiation is negligible, which increases the cycle life of the battery. Finally, the diffusion coefficient of Li+ in LTO (2 × 10−8 cm2 s−1) is larger than in graphite, which, added to the fact that the dendritic effect is avoided, increases importantly the rate capability. The LTO anode has two drawbacks. The energy density of the cells equipped with LTO anode is lower compared with the same cells with graphite anode, because the capacity of LTO is limited to 175 mAh g−1, and because of the higher redox potential. The main drawback, however, is the low electrical conductivity (10−13 S cm−1) and ionic conductivity (10−13–10−9 cm2 s−1). Different strategies have been used to address this drawback: nano-structuration of LTO to reduce the path of Li+ ions and electrons inside LTO, ion doping, and incorporation of conductive nanomaterials. The synthesis of LTO with the appropriate structure and the optimized doping and the synthesis of composites incorporating conductive materials is thus the key to achieving high-rate capability. That is why a variety of synthesis recipes have been published on the LTO-based anodes. The progress in the synthesis of LTO-based anodes in recent years is such that LTO is now considered a substitute for graphite in lithium-ion batteries for many applications, including electric cars and energy storage to solve intermittence problems of wind mills and photovoltaic plants. In this review, we examine the different techniques performed to fabricate LTO nanostructures. Details of the synthesis recipes and their relation to electrochemical performance are reported, allowing the extraction of the most powerful synthesis processes in relation to the recent experimental results.

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Section: Synthesis Methodsmentioning

confidence: 99%

Section: Synthesis Methodsmentioning

confidence: 99%

Fabrication of Li4Ti5O12 (LTO) as Anode Material for Li-Ion Batteries

Julien,

Mauger

2024

Micromachines

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“…In prior investigations, the same effect was observed for Nb doped electrodes. [52,53] To determine the capacity contribution of the CF, the CV curves of the bare CF in 3 m KOH electrolyte at scan rate of 100 mV s −1 were measured (Figure S11f, Supporting Information). The integral area under the CV curves of the CF and Nb-CMO 4 @C x S y NC electrode is compared in one plot, it indicates the integral area of the CF is negligible.…”

Section: Electrochemical Performance Of Electrodesmentioning

confidence: 99%

Reconfiguring the Electronic Structure of Heteroatom Doped Carbon Supported Bimetallic Oxide@Metal Sulfide Core–Shell Heterostructure via In Situ Nb Incorporation toward Extrinsic Pseudocapacitor

Patil

Moon

Seo

et al. 2022

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High‐energy‐density battery‐type materials have sparked considerable interest as supercapacitors electrode; however, their sluggish charge kinetics limits utilization of redox‐active sites, resulting in poor electrochemical performance. Here, the unique core–shell architecture of metal organic framework derived N–S codoped carbon@CoxSy micropetals decorated with Nb‐incorporated cobalt molybdate nanosheets (Nb‐CMO4@CxSyNC) is demonstrated. Coordination bonding across interfaces and π–π stacking interactions between CMO4@CxSy and N and, S–C can prevent volume expansion during cycling. Density functional theory analysis reveals that the excellent interlayer and the interparticle conductivity imparted by Nb doping in heteroatoms synergistically alter the electronic states and offer more accessible species, leading to increased electrical conductivity with lower band gaps. Consequently, the optimized electrode has a high specific capacity of 276.3 mAh g−1 at 1 A g−1 and retains 98.7% of its capacity after 10 000 charge–discharge cycles. A flexible quasi‐solid‐state SC with a layer‐by‐layer deposited reduced graphene oxide /Ti3C2TX anode achieves a specific energy of 75.5 Wh kg−1 (volumetric energy of 1.58 mWh cm−3) at a specific power of 1.875 kWh kg−1 with 96.2% capacity retention over 10 000 charge–discharge cycles.

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“…Yi et al assumed that Nb 5+ ion substitutes in the octahedral (16d) site of both the Li 1+ and Ti 4+ ions with very few oxygen vacancies in the spinel Li 4 Ti 4.95 Nb 0.05 O 12 compounds, thus explaining the higher electrical conductivity [9]. Recently, Babu [11]. Therefore, the transition metal (TM) substituted LTO is regarded as the most effective method for improving the electronic conductivity of spinel LTO [12,13].…”

Section: Introductionmentioning

confidence: 99%

Cation Distribution Effect on Structural and Electronic Properties of Oxygen Vacancy and Niobium Substituted Spinel Lithium Titanium Oxide Anode Material in Lithium-ion Batteries

Tsogbadrakh

Sarantuya

Munkhbaatar

et al. 2023

DDF

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We have presented the results of detailed studies of oxygen vacancy and niobium (Nb) substituted spinel Li4Ti5O12 (LTO) materials using first-principles method within the framework of the density functional theory (DFT). We have shown that the ground state of oxygen vacancy and Nb substituted LTO is paramagnetic (PM), and the Nb substitution is most stable on the 16d sites of both the Li and Ti ions. We have indicated that the Nb substitution in the 16d site of Li ion become the n-type metallic material. But the oxygen vacancy containing NbT i substituted LTO is changed from the p-type to the n-type, as increased a concentration of Nb ions.

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Enhanced Electrochemical Performance of Li4Ti5O12 by Niobium Doping for Pseudocapacitive Applications

Cited by 6 publications

References 58 publications

Fabrication of Li4Ti5O12 (LTO) as Anode Material for Li-Ion Batteries

Fabrication of Li4Ti5O12 (LTO) as Anode Material for Li-Ion Batteries

Reconfiguring the Electronic Structure of Heteroatom Doped Carbon Supported Bimetallic Oxide@Metal Sulfide Core–Shell Heterostructure via In Situ Nb Incorporation toward Extrinsic Pseudocapacitor

Cation Distribution Effect on Structural and Electronic Properties of Oxygen Vacancy and Niobium Substituted Spinel Lithium Titanium Oxide Anode Material in Lithium-ion Batteries

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