2023
DOI: 10.1016/j.apsusc.2022.156217
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In situ anchoring of MnO nanoparticles into three-dimensional nitrogen-doped porous carbon framework as a stable anode for high-performance lithium storage

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Cited by 16 publications
(10 citation statements)
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“…The Warburg impedance coefficient (σ) of Li + is calculated using the following equations Z = R s + R normalS normalE normalI + R normalc normalt + σ ω 1 / 2 where σ is the line slope by fitting the plot of Z re vs ω –1/2 before and after cycling. Then, the Li + diffusion coefficient ( D Li + ) is calculated using the following equation , D L i + = 0.5 ( R T / A ρ 2 F 2 C σ ) 2 where R is the molar gas constant (8.314 J mol –1 K –1 ), A is the surface area of the electrode (m 2 ), ρ is the number of electrons per oxidized molecule, T is the test temperature (K), C is the molar concentration of Li + in the crystal, and F is the Faraday constant (96,500 C mol –1 ). Before cycling, σ values are much higher, and the Li + diffusion coefficient is only 2.24 × 10 –18 cm 2 s –1 for C 60 NRs-6012h, whereas for C 60 NRs-603001h, the Li + diffusion coefficient is 1.40 × 10 –17 cm 2 s –1 .…”
Section: Resultsmentioning
confidence: 99%
“…The Warburg impedance coefficient (σ) of Li + is calculated using the following equations Z = R s + R normalS normalE normalI + R normalc normalt + σ ω 1 / 2 where σ is the line slope by fitting the plot of Z re vs ω –1/2 before and after cycling. Then, the Li + diffusion coefficient ( D Li + ) is calculated using the following equation , D L i + = 0.5 ( R T / A ρ 2 F 2 C σ ) 2 where R is the molar gas constant (8.314 J mol –1 K –1 ), A is the surface area of the electrode (m 2 ), ρ is the number of electrons per oxidized molecule, T is the test temperature (K), C is the molar concentration of Li + in the crystal, and F is the Faraday constant (96,500 C mol –1 ). Before cycling, σ values are much higher, and the Li + diffusion coefficient is only 2.24 × 10 –18 cm 2 s –1 for C 60 NRs-6012h, whereas for C 60 NRs-603001h, the Li + diffusion coefficient is 1.40 × 10 –17 cm 2 s –1 .…”
Section: Resultsmentioning
confidence: 99%
“…As shown in Figure 7 a, there are two clear reduction peaks at about 0.06 V and 0.36 V for MBC, which are the formation of Li 2 O and the reduction in MnO to manganese. During the anodic scan, there is a visible oxidation peak centered at approximately 1.25 V, which corresponds to the oxidation process occurring when Mn is being converted into MnO [ 39 ]. Similar peaks are observed for MSC and MnO, indicating a similar reaction mechanism.…”
Section: Resultsmentioning
confidence: 99%
“…Nevertheless, most transition metal oxides display poor conductivity, thereby leading to the low utilization efficiency and rate performance of active materials [ 10 , 11 ]. To improve the low conductivity of transition metal oxide electrode materials, generally, they are combined with high-conductivity carbon materials [ 12 , 13 ]. For such composite materials, transition metal oxides only come into contact with conductive carbon on their surface, and the internal conductivity of the transition metal oxide materials has not been improved.…”
Section: Introductionmentioning
confidence: 99%