Electrochemical performance of a novel surface modified spherical graphite as anode material for lithium ion batteries

Endo, Koji; Zhang, H.P.; Fu, Lijun; Lee, Kyeong Jik; Sekine, Kyoichi; Takamura, Tsutomu; Jeong, Yeon Uk; Wu, Yongmin; Holze, Rudolf; Wu, Haoyu

doi:10.1007/s10800-006-9177-0

Cited by 13 publications

(5 citation statements)

References 10 publications

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“…by the soft‐chemical method, and it showed good promise as a lithium‐ion battery anode material. Later on, H 2 Ti 12 O 25 , as a new member of the titanate family, gradually attracted increasing attention owing to the fact that its reversibility is higher than that of commercial graphite and because of its high lithium insertion voltage (1.55 V vs. Li + /Li), which can inhibit the formation of a SEI film and reduce the formation of Li dendrites, which increases the safety aspect. Furthermore, relative to that shown by Li 4 Ti 5 O 12 , H 2 Ti 12 O 25 shows an outstanding theoretical capacity of 274.6 mAh g −1 , higher protonic conductivity of 8.71×10 −9 S cm −1 , and better cycle performance .…”

Section: Introductionsupporting

confidence: 58%

“…With Na 2 Ti 3 O 7 as the precursor,b ulky H 2 Ti 12 O 25 was first successfully prepared in 2011b yA kimoto et al by the soft-chemical method, [10] and it showed good promise as al ithium-ion battery anode material. Later on, H 2 Ti 12 O 25 ,a san ew member of the titanate family,g radually attracted increasinga ttention owing to the fact that its reversibility is highert han that of commercial graphite [11] and because of its high lithium insertion voltage (1.55 Vv s. Li + /Li), which can inhibit the formation of aS EI film and reduce the H 2 Ti 12 O 25 holds great promise as ah igh-voltage anode material for advanced lithium-ion battery applications. To enhancei ts electrochemical performance, control of the crystal orientation and morphologyi sa ne ffective wayt oc ope with slow Li + -ion diffusioni nside H 2 Ti 12 O 25 with severe anisotropy.I nt his report, Na 2 Ti 6 O 13 nanorods, prepared from Na 2 CO 3 and anatase TiO 2 in molten NaCl medium, were used as ap recursor in the synthesis of long single-crystal H 2 O 25 shows an outstanding theoretical capacity of 274.6 mAh g À1 , higher protonic conductivity of 8.71 10 À9 Scm À1 , [12] and better cycle performance.…”

Section: Introductionmentioning

confidence: 99%

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High Lithium Insertion Voltage Single‐Crystal H₂Ti₁₂O₂₅ Nanorods as a High‐Capacity and High‐Rate Lithium‐Ion Battery Anode Material

Guo

Chen

Shan³

et al. 2017

ChemSusChem

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H2Ti12O25 holds great promise as a high‐voltage anode material for advanced lithium‐ion battery applications. To enhance its electrochemical performance, control of the crystal orientation and morphology is an effective way to cope with slow Li+‐ion diffusion inside H2Ti12O25 with severe anisotropy. In this report, Na2Ti6O13 nanorods, prepared from Na2CO3 and anatase TiO2 in molten NaCl medium, were used as a precursor in the synthesis of long single‐crystal H2Ti12O25 nanorods with reactive facets. The as‐prepared H2Ti12O25 nanorods with a diameter of 100–200 nm showed higher charge (extraction) specific capacity and better rate performance than previously reported systems. The reversible capacity of H2Ti12O25 was 219.8 mAh g−1 at 1C after 100 cycles, 172.1 mAh g−1 at 10C, and 144.4 mAh g−1 at 20C after 200 cycles; these values are higher than those of H2Ti12O25 prepared by the conventional soft‐chemical method. Moreover, the as‐prepared H2Ti12O25 nanorods exhibited superior cycle stability with more than 94 % retention of capacity with nearly 100 % coulombic efficiency after 100 cycles at 1C. On the basis of the above results, long single‐crystal H2Ti12O25 nanorods synthesized in molten NaCl with outstanding electrochemical characteristics hold a significant amount of promise for hybrid electric vehicles and energy‐storage systems.

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Section: Introductionsupporting

confidence: 58%

Section: Introductionmentioning

confidence: 99%

High Lithium Insertion Voltage Single‐Crystal H₂Ti₁₂O₂₅ Nanorods as a High‐Capacity and High‐Rate Lithium‐Ion Battery Anode Material

Guo

Chen

Shan³

et al. 2017

ChemSusChem

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“…After several cycles, the distribution of liquid electrolyte is uniform and the electrochemical performance of the lithium ion battery becomes stable. In the case of the commerical SSG [20,21] and LiCo 1/3 Ni 1/3 Mn 1/3 O 2 , their cycling is very stable and can be above 500 times. Theses initial data prove that this kind of gelled polymer lithium ion battery is very satisfactory.…”

Section: Resultsmentioning

confidence: 99%

A Gelled Polymer Electrolyte with the Blend of PMMA and PVDF of Novel Stick-Like Morphology

Zhang¹,

Zhang²,

Sun³

et al. 2007

Zeitschrift Für Physikalische Chemie

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A novel stick-like polymer based on poly(methyl methacrylate)(PMMA) and poly-(vinylidene fluoride) (PVDF) has been prepared. Its physical properties were studied with scanning electronic microscopy (SEM), X-ray diffractometry (XRD) and Fourier transform infrared spectroscopy (FTIR). Due to the interaction of PVDF with PMMA, the dispersion of PVDF is homogeneous. Its gelled polymer electrolyte (GPE) with 1 M LiPF 6 /ethylene carbonate (EC)/ethyl methyl carbonate (EMC)/dimethyl carbonate (DMC) (1 : 1 : 1) is very stable with an electrochemical window up to 5 V vs. Li + /Li. The ionic conductivity reaches 0.32 mS/cm at ambient temperature. The electrochemical performances of a polymer lithium ion battery consisting of graphite anode, the GPE and LiCo 1/3 Ni 1/3 Mn 1/3 O 2 cathode has been studied, initial results show that this gelled polymer electrolyte is very promising.

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“…), and it can maintain its quality and its performance can be controlled by changing the manufacturing process. In order to produce high-quality synthetic graphite for anode materials, however, a high temperature of 3000 °C or higher is required [1][2][3].…”

Section: Introductionmentioning

confidence: 99%

Properties of synthetic graphite from boric acid-added pitch: performance as anode in lithium-ion batteries

Hwang

Ahn

et al. 2021

SN Appl. Sci.

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Synthetic graphite is produced by a heat treatment process using a carbon precursor (pitch, coke), but it is difficult to produce synthetic graphite of high quality due to the high-temperature process (minimum 3000 °C). Elements used as additive to lower temperature the graphitic process include boron, phosphorus, and nitrogen. Boron is known as a graphitization additive, because it accelerates the homogeneous continuous graphitization process of the entire carbon without any formation of specific carbon components such as graphite. In this study, various amounts of boron and PFO (pyrolysis fuel oil, carbon precursor) were used in an attempt to reveal the boron additive effect. Pitch was produced using a boric acid and pyrolysis fuel oil (PFO), and high-temperature carbonization was carried out at 2600 °C. As a result, synthetic graphite exhibiting high crystallinity at a relatively low temperature was produced. The electrochemical performance of several boron-doped and non-doped carbon materials with different structures as anodes in lithium-ion batteries was investigated by a structure analysis.

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Electrochemical performance of a novel surface modified spherical graphite as anode material for lithium ion batteries

Cited by 13 publications

References 10 publications

High Lithium Insertion Voltage Single‐Crystal H₂Ti₁₂O₂₅ Nanorods as a High‐Capacity and High‐Rate Lithium‐Ion Battery Anode Material

High Lithium Insertion Voltage Single‐Crystal H₂Ti₁₂O₂₅ Nanorods as a High‐Capacity and High‐Rate Lithium‐Ion Battery Anode Material

A Gelled Polymer Electrolyte with the Blend of PMMA and PVDF of Novel Stick-Like Morphology

Properties of synthetic graphite from boric acid-added pitch: performance as anode in lithium-ion batteries

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Electrochemical performance of a novel surface modified spherical graphite as anode material for lithium ion batteries

Cited by 13 publications

References 10 publications

High Lithium Insertion Voltage Single‐Crystal H2Ti12O25 Nanorods as a High‐Capacity and High‐Rate Lithium‐Ion Battery Anode Material

High Lithium Insertion Voltage Single‐Crystal H2Ti12O25 Nanorods as a High‐Capacity and High‐Rate Lithium‐Ion Battery Anode Material

A Gelled Polymer Electrolyte with the Blend of PMMA and PVDF of Novel Stick-Like Morphology

Properties of synthetic graphite from boric acid-added pitch: performance as anode in lithium-ion batteries

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High Lithium Insertion Voltage Single‐Crystal H₂Ti₁₂O₂₅ Nanorods as a High‐Capacity and High‐Rate Lithium‐Ion Battery Anode Material

High Lithium Insertion Voltage Single‐Crystal H₂Ti₁₂O₂₅ Nanorods as a High‐Capacity and High‐Rate Lithium‐Ion Battery Anode Material