Thermally reduced graphene paper with fast Li ion diffusion for stable Li metal anode

Yu, Yikang; Huang, Wei; Song, Xing; Wang, Wenhui; Hou, Zhen; Zhao, Xixia; Deng, Kerong; Ju, Huanxin; Sun, Yugang; Zhao, Yusheng; Lu, Yi‐Chun; Quan, Zewei

doi:10.1016/j.electacta.2018.10.117

Cited by 33 publications

(20 citation statements)

References 73 publications

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“…where Z' is a real impedance, R s is the electrolyte resistance, R ct is the charge transfer resistance, σ ω is the Warburg factor, ω is the angular frequency, D is the diffusion coefficient of lithium ions in the electrode material, R is the gas constant (8.314 J mol −1 K −1 ), T is the absolute temperature (K), A is the surface area of the electrode (cm 2 ), F is the Faraday constant (96 486.33 C mol −1 ), and C is the molar concentration of lithium ion (7.69 × 10 −3 mol cm -3 ) [21]. A summary of the EIS measurement and the diffusion coefficient of lithium ions (D) in the electrode material is shown in Table 4.…”

Section: Resultsmentioning

confidence: 99%

“…Furthermore, the theoretical specific capacity of LTO (175 mAh/g) is considered small and reduces the total energy in a battery [15]. To enhance the electrochemical performance of LTO, a number of strategies have been conducted including reduction to nanostructure [16,17], heteroatom doping [18,19], morphological control [20,21], surface modification [22,23], and coating with conductive materials [24,25].…”

Section: Introductionmentioning

confidence: 99%

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Role of TiO2 Phase Composition Tuned by LiOH on The Electrochemical Performance of Dual-Phase Li4Ti5O12-TiO2 Microrod as an Anode for Lithium-Ion Battery

et al. 2020

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In this study, a dual-phase Li4Ti5O12-TiO2 microrod was successfully prepared using a modified hydrothermal method and calcination process. The stoichiometry of LiOH as precursor was varied at mol ratio of 0.9, 1.1, and 1.3, to obtain the appropriate phase composition between TiO2 and Li4Ti5O12. Results show that TiO2 content has an important role in increasing the specific capacity of electrodes. The refinement of X-ray diffraction patterns by Rietveld analysis confirm that increasing the LiOH stoichiometry suppresses the TiO2 phase. In the scanning electron microscopy images, the microrod morphology was formed after calcination with diameter sizes ranging from 142.34 to 260.62 nm and microrod lengths ranging from 5.03–7.37 μm. The 0.9 LiOH sample shows a prominent electrochemical performance with the largest specific capacity of 162.72 mAh/g and 98.75% retention capacity achieved at a rate capability test of 1 C. This finding can be attributed to the appropriate amount of TiO2 that induced the smaller crystallite size, and lower charge transfer resistance, enhancing the lithium-ion insertion/extraction process and faster diffusion kinetics.

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Section: Resultsmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Role of TiO2 Phase Composition Tuned by LiOH on The Electrochemical Performance of Dual-Phase Li4Ti5O12-TiO2 Microrod as an Anode for Lithium-Ion Battery

et al. 2020

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“…Meanwhile, the mass capacity loss of lithium metal can be highly avoided besause of its lightweight. Due to the above characteristics, the use of carbon-based materials as lithium metal anode scaffolds has received more and more attention, such as graphene 24,59 , carbon fiber 60 , carbon nanotubes 61 , reduced graphere oxide 13 and so on.…”

Section: Compositing With Carbon-based Scaffoldsmentioning

confidence: 99%

Composite Anodes for Lithium Metal Batteries

Zhang¹,

Ren²,

Wang³

et al. 2020

Acta Physico Chimica Sinica

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The applications of lithium-ion batteries have been limited because their energy density can no longer meet the requirements of an emerging energy society. Lithium metal batteries (LMBs) are being considered as potential candidate for nextgeneration energy storage systems owing to the high theoretical specific capacity and low electrochemical potential of lithium metal. However, the commercialization of LMB is limited due to several challenges, such as uncontrollable formation of dendrites, unstable solid electrolyte interface, and infinite anode volume change, which can lead to grievous catastrophe. In this study, several typical mechanisms of lithium dendrite formation and growth are summarized. The results suggest that a smaller current density, greater Li + transference number, higher mechanical strength of the electrolyte, and a more homogeneous distribution of Li + on the substrate are conducive to the uniform deposition morphology of lithium metal. In view of these results, combined with the researches on LMBs conducted in recent years, composite anodes can be summarized into three level from internal to external. (i) Internal composite of lithium metal anode: the scaffolds composited with lithium metal are classified as non-conductive (NC), electron-conductive (EC), ion-conductive (IC), and mixed ion and electron-conductive (MIEC) scaffolds. Composited with NC scaffolds, the tip effect can be weakened through the interaction between polar functional groups and Li + . The composite of lithium metal and EC scaffolds can effectively reduce the local current density, while IC scaffolds can increase the ion flux. However, the performance of LMBs may be hindered by the insulation of electrons or Li + at high rates. In comparison, MIEC scaffolds can provide fast ion/electron transfer channels for the deposition or dissolution of lithium metal, which is beneficial for the electrochemical performance of LMBs even at high rates. (ii) Internal composite of LMB: Compared with liquid electrolytes, solid-state electrolytes (SSEs) and quasi-solid-state electrolytes are much safer. However, their interfacial contact with lithium metal anodes has been seriously criticized. Lithium metal anodes can be composited with SSEs or quasi-solid-state electrolytes to optimize the interface contact performance and reduce the interface resistance, thereby promoting the development of solid-state batteries. (iii) Composite of internal environment and external operating conditions: Composited with external physical fields, such as electric fields, magnetic fields, and temperature fields, the distribution of Li + can be homogeneous and the initial nucleation process can be regulated. Overall, this review summarizes several composite anodes that have greatly optimized the performance of LMBs and highlights the potential of multi-level composites for applications in lithium metal anodes.

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“…The corresponding impedance and rate performance test results are also consistent with the expected results (Figures 10G,H). Additionally, based on the excellent lithiophilic performance and mechanical strength of reduced graphene oxide, Yu's team developed (Yu et al, 2019) a reduced graphene oxide paper to adjust the electroplating process of lithium, and the rapid diffusion of lithium ions was successfully achieved.…”

Section: Carbon-based Materials For Safe Lithium Metal Anodesmentioning

confidence: 99%

A Review of Carbon-Based Materials for Safe Lithium Metal Anodes

Liu

Fan

et al. 2019

Front. Chem.

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Lithium metal is a promising anode material with extremely high theoretical specific capacity (3,860 mA h g−1), low density (0.59 g cm−3), and the lowest negative electrochemical potential of all potential candidates (−3.04 V vs. the standard hydrogen electrode). However, uncontrollable Li dendrite growth leads to a short lifespan and catastrophic safety hazards, which has restricted its practical application for many years. Some effective strategies have been adopted regarding these challenges, including electrolyte modification, introducing a protective layer, nanostructured anodes, and membrane modification. Carbon-based materials have been demonstrated to significantly address the challenge of Li dendrites. In this review, carbon-based materials and their application and challenges in lithium metal anode protection have been discussed in detail. In addition, the applications of lithium anodes protected by carbon-based materials in Li-S batteries and Li-O2 batteries have been summarized.

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Thermally reduced graphene paper with fast Li ion diffusion for stable Li metal anode

Cited by 33 publications

References 73 publications

Role of TiO2 Phase Composition Tuned by LiOH on The Electrochemical Performance of Dual-Phase Li4Ti5O12-TiO2 Microrod as an Anode for Lithium-Ion Battery

Role of TiO2 Phase Composition Tuned by LiOH on The Electrochemical Performance of Dual-Phase Li4Ti5O12-TiO2 Microrod as an Anode for Lithium-Ion Battery

Composite Anodes for Lithium Metal Batteries

A Review of Carbon-Based Materials for Safe Lithium Metal Anodes

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