Implanting MnO into a three-dimensional carbon network as superior anode materials for lithium-ion batteries

Liu, Zheng; Wang, Xiaodan; Lai, Fengyu; Wang, Chao; Ye, Nan; Sun, Hongxia; Geng, Baoyou

doi:10.1016/j.ceja.2021.100146

Cited by 8 publications

(3 citation statements)

References 42 publications

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“…[29] Additionally, an oxidation peak centered at ≈2.1 V indicates the possible occurrence of the side reaction of Mn 2+ →Mn 3+ . [30] After the first cycle, the CV curves basically coincide, suggesting good reversibility and structural stability in the process of charge and discharge. To emphasize the role of the Mn─O─C bond in enhancing the electrochemical performance, we synthesized MnO-rGO by physically mixing MnO and rGO in a mass ratio of 7:3, maintaining the rGO content consistent with MnO/rGO, as demonstrated by the TG-DSC test in Figure S6 (Supporting information).…”

Section: Electrochemical Li-storage Properties and Kinetic Analysesmentioning

confidence: 78%

Synergistic Corrosion Engineering on Metallic Manganese Toward High‐Performance Electrochemical Energy Storage

Sun,

Wang,

Lyv

et al. 2024

Adv Funct Materials

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MnO/rGO with enhanced electrochemical kinetic properties is widely investigated as electrode for high‐performance electrochemical energy storage (EES) devices. However, the synthesis of MnO/rGO via traditional methods suffers from low atomic utilization and complex techniques that are undesirable for practical implementation. Different from existing fabrication strategies, here using metallic manganese as Mn source, a novel, eco‐friendly, and corrosion engineering‐based approach to address the above issues is demonstrated. It is thermodynamically feasible as supported by the E‐pH analysis and for the first time, a significant synergetic effect is observed between NH4+ and GO in strengthening the metallic Mn corrosion reaction. Particularly, in the “ammonia circulation” process, the NH3 molecule, derived from NH4+, acts as a “carrier” for Mn2+ to facilitate its transfer by forming [Mn(NH3)2]2+, which effectively prevents “in situ corrosion”. The phase and structure evolution during the reaction are clarified, and the synergistic corrosion mechanism is also proposed. Benefiting from the efficient lithium‐ion evolution kinetics, Mn─O─C bond formed between MnO and rGO and outstanding structural integrity, the resultant MnO/rGO demonstrates exceptional EES performances in both lithium‐ion batteries and lithium‐ion capacitors. This finding will offer potential for mild, cost‐effective, and environmentally friendly fabrication of other graphene‐based metal oxide electrodes using corrosion engineering.

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Section: Electrochemical Li-storage Properties and Kinetic Analysesmentioning

confidence: 78%

Synergistic Corrosion Engineering on Metallic Manganese Toward High‐Performance Electrochemical Energy Storage

Sun,

Wang,

Lyv

et al. 2024

Adv Funct Materials

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“…36 The large capacity loss during first cycle is a common phenomenon due to the electrolyte decomposition as well as SEI film growth on the active material which further becomes stable in subsequent cycles and favors electrochemical activity. [39][40][41] The CE improved considerably to 99% in the second and third cycles, representing the significant improvement of reversibility.…”

Section: Resultsmentioning

confidence: 99%

“…For instance, the initial discharge capacity reported by Cunbao Zhang et al, is 1179 mAhg −1 (MnO/C core‐shell nanowires), 38 Edmund Samuel et al, is 1131 mAhg −1 (MnO nanocrystal on CNFs), 27 and Qinyuan Huang et al, is 923 mAhg −1 (Wood derived carbon fibers@MnO) 36 . The large capacity loss during first cycle is a common phenomenon due to the electrolyte decomposition as well as SEI film growth on the active material which further becomes stable in subsequent cycles and favors electrochemical activity 39‐41 . The CE improved considerably to 99% in the second and third cycles, representing the significant improvement of reversibility.…”

Section: Resultsmentioning

confidence: 99%

Highly flexible metal/metal oxide embedded carbon nanofiber membranes as binder‐free materials for Lithium‐ion batteries

Divya¹,

Vadivel

Prakash

et al. 2022

Intl J of Energy Research

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Summary Free‐standing materials with good flexibility is of great interest for energy storage applications. Herein, N‐MnO carbon nanofibers (N‐MnC) composite is synthesized by introducing one dimensional MnO2 nanowires (1D MnO2 NWs) into PAN and PVB composite solution through electrospinning. The synthesized membranes are directly used as freestanding electrodes for lithium‐ion battery (LIB) applications. During synthesis, MnO2 NWs transformed into MnO spherical nanoparticles (NPs) and embedded on carbon nanofibers (CNFs), resulting in an N‐MnC composite. N‐MnC composite exhibited a discharge/charge capacity of 1405/1114 mAhg−1 at a current density of 0.1 Ag−1 as an anode for LIBs which is much better than that of pure MnO, MnO2 electrodes. The outstanding performance of N‐MnC composite may be credited to its good electrical conductivity, structural integrity, low dimension CNFs (high surface area), and good contact between CNFs and MnO NPs. Hence, the simple and cost‐effective strategy of fabricating freestanding electrodes with high flexibility and good conductivity is the most promising approach for addressing practical concerns at the device level, especially for lightweight and flexible electronics.

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Metal/Metal Oxide (N-MnO/rGO) Encapsulated Carbon Nanofiber Composites for High-performance Li-ion Batteries

Divya¹,

Prakash

et al. 2022

J Clust Sci

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Implanting MnO into a three-dimensional carbon network as superior anode materials for lithium-ion batteries

Cited by 8 publications

References 42 publications

Synergistic Corrosion Engineering on Metallic Manganese Toward High‐Performance Electrochemical Energy Storage

Synergistic Corrosion Engineering on Metallic Manganese Toward High‐Performance Electrochemical Energy Storage

Highly flexible metal/metal oxide embedded carbon nanofiber membranes as binder‐free materials for Lithium‐ion batteries

Metal/Metal Oxide (N-MnO/rGO) Encapsulated Carbon Nanofiber Composites for High-performance Li-ion Batteries

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