A flexible free-standing cathode based on graphene-like MoSe2 nanosheets anchored on N-doped carbon nanofibers for rechargeable aluminum-ion batteries

Yang, Wenwen; Lu, Huimin; Cao, Yuan; Jing, Pengcheng; Hu, Xueqi; Yu, Hao

doi:10.1007/s11581-020-03476-x

Cited by 19 publications

(22 citation statements)

References 56 publications

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“…Moreover, the safety of metallic aluminum (Al) anodes follows a three-electron-transfer redox reaction owing to its trivalent (Al 3+ ) nature (i.e., the strong Coulombic effect of Al 3+ ions), which leads to a high theoretical gravimetric capacity (~ 2980 mAh g −1 ) and approximately fourfold volumetric capacity (~ 8046 mAh cm -3 ) compared with those of lithium anodes (~ 2080 mAh cm -3 ) [4][5][6]. In early efforts, different types of cathode materials, such as carbon materials [7][8][9][10][11], metal oxides (V 2 O 5 , VO 2 , and TiO 2 ) [12,13], metal sulfides and selenides [14][15][16], and conducting polymers [17], have been widely applied to rechargeable AIBs. However, their practical applications were substantially limited due to inadequate cathodic performance such as low specific capacity, low charge-discharge voltage plateaus, and shorter cycle life.…”

Section: Introductionmentioning

confidence: 99%

High-Defect-Density Graphite for Superior-Performance Aluminum-Ion Batteries with Ultra-Fast Charging and Stable Long Life

2021

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Rechargeable aluminum-ion batteries (AIBs) are a new generation of low-cost and large-scale electrical energy storage systems. However, AIBs suffer from a lack of reliable cathode materials with insufficient intercalation sites, poor ion-conducting channels, and poor diffusion dynamics of large chloroaluminate anions (AlCl4− and Al2Cl7−). To address these issues, surface-modified graphitic carbon materials [i.e., acid-treated expanded graphite (AEG) and base-etched graphite (BEG)] are developed as novel cathode materials for ultra-fast chargeable AIBs. AEG has more turbostratically ordered structure covered with abundant micro- to nano-sized pores on the surface structure and expanded interlayer distance (d002 = 0.3371 nm) realized by surface treatment of pristine graphite with acidic media, which can be accelerated the diffusion dynamics and efficient AlCl4− ions (de)-intercalation kinetics. The AIB system employing AEG exhibits a specific capacity of 88.6 mAh g−1 (4 A g−1) and ~ 80 mAh g−1 at an ultra-high current rate of 10 A g−1 (~ 99.1% over 10,000 cycles). BEG treated with KOH solution possesses the turbostratically disordered structure with high density of defective sites and largely expanded d-spacing (d002 = 0.3384 nm) for attracting and uptaking more AlCl4− ions with relatively shorter penetration depth. Impressively, the AIB system based on the BEG cathode delivers a high specific capacity of 110 mAh g−1 (4 A g−1) and ~ 91 mAh g−1 (~ 99.9% over 10,000 cycles at 10 A g−1). Moreover, the BEG cell has high energy and power densities of 247 Wh kg−1 and 44.5 kW kg−1. This performance is one of the best among the AIB graphitic carbon materials reported for chloroaluminate anions storage performance. This finding provides great significance for the further development of rechargeable AIBs with high energy, high power density, and exceptionally long life.

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Section: Introductionmentioning

confidence: 99%

High-Defect-Density Graphite for Superior-Performance Aluminum-Ion Batteries with Ultra-Fast Charging and Stable Long Life

2021

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“…The charge density of Al 3+ is found to be significantly stronger than that of Li + ; thus, Al 3+ insertion and extraction into MoS 2 is more difficult than that of Li + ions. Thus, some small peaks in the CV curves are ascribed to the poor dynamics of insertion and extraction of Al 3+ …”

Section: Resultsmentioning

confidence: 99%

“…The presence of C–O and CO has been assigned to the electrochemical oxidation of carbon during the Al 3+ deintercalation process (Figure S11). The most significant role of N-doped carbon is to enhance the MoS 2 conductivity and to provide protection for MoS 2 during the cycle process, thus reducing the volume expansion and structural degradation of MoS 2 . , …”

Section: Resultsmentioning

confidence: 99%

“…Thus, some small peaks in the CV curves are ascribed to the poor dynamics of insertion and extraction of Al 3+ . 45 To understand the electrochemical capability of MNC better, we also tested the rate capability between the current density of 0.3 and 5 mA g −1 , as seen from Figure 4b. MNC provides an average discharge capacity of 297.9 mAh g −1 at 0.3 mA g −1 .…”

Section: Resultsmentioning

confidence: 99%

“…35 The most significant role of N-doped carbon is to enhance the MoS 2 conductivity and to provide protection for MoS 2 during the cycle process, thus reducing the volume expansion and structural degradation of MoS 2 . 35,45 Based on the above analysis, the electrochemistry at the MNC cathode in the process of discharge and charge in AIBs has been identified as follows (Figure 6e):…”

Section: Resultsmentioning

confidence: 99%

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Interlayer-Expanded MoS₂/N-Doped Carbon with Three-Dimensional Hierarchical Architecture as a Cathode Material for High-Performance Aluminum-Ion Batteries

Guo

Yang

Liu

et al. 2021

ACS Appl. Energy Mater.

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Aluminum-ion batteries (AIBs) have drawn remarkable attention because of the large capacity, inexpensiveness, and abundance of Al in nature. However, the low capacity and poor cycle life of the cathode materials tremendously hinder their development. The fabrication of interlayer-expanded MoS2/N-doped carbon (MNC) with a three-dimensional (3D) hierarchical tremella structure through a hydrothermal treatment and calcination is described in this work. As cathode materials, MNC shows decent capacity and superior cycle stability. Remarkably, the MNC electrode presents a capacity as high as 191.2 mAh g–1, following 450 cycles with a current density of 0.5 A g–1. Moreover, the MNC electrode presents a specific capacity of 127.5 mAh g–1, following 1700 cycles at 1A g–1, and the associated Coulomb efficiency reaches 99.5%. The unique 3D hierarchical structure and interlayer spacing, which reach up to 0.82 nm, reduce the diffusion path for Al3+, boost the diffusion of Al3+, and provide more active sites. Meanwhile, N-doped carbon is beneficial to promote electronic conductivity and maintaining structural integrity during cycles. The insertion and extraction mechanism of Al3+ in MNC has been put forward and confirmed to understand its outstanding electrochemical performance. This study exhibits a strategy to obtain advanced AIB electrode materials through 3D hierarchical architecture design.

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Advanced Carbons Nanofibers‐Based Electrodes for Flexible Energy Storage Devices

Sun,

Han,

Wang

et al. 2023

Adv Funct Materials

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The rapid developments of the Internet of Things (IoT) and portable electronic devices have created a growing demand for flexible electrochemical energy storage (EES) devices. Nevertheless, these flexible devices suffer from poor flexibility, low energy density, and poor dynamic stability of power output during deformation, limiting their practical applications. Carbon nanofibers (CNFs) with high conductivity, good flexibility, and large‐scale preparation are regarded as promising electrodes for flexible EES devices. Based on the issues of current flexible EES devices, this review presents various strategies from the design of CNFs‐based electrodes to the fabrication of devices and overviews their applications in various flexible metal ion/air batteries (Li/Na/K‐ion batteries, Li‐S batteries, metal–air batteries, and other novel secondary batteries) and supercapacitors. Finally, the remaining challenges and perspectives on the CNFs‐based flexible EES devices are proposed to provide guidance for the researchers concentrating on high‐performance flexible EES devices.

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A flexible free-standing cathode based on graphene-like MoSe2 nanosheets anchored on N-doped carbon nanofibers for rechargeable aluminum-ion batteries

Cited by 19 publications

References 56 publications

High-Defect-Density Graphite for Superior-Performance Aluminum-Ion Batteries with Ultra-Fast Charging and Stable Long Life

High-Defect-Density Graphite for Superior-Performance Aluminum-Ion Batteries with Ultra-Fast Charging and Stable Long Life

Interlayer-Expanded MoS₂/N-Doped Carbon with Three-Dimensional Hierarchical Architecture as a Cathode Material for High-Performance Aluminum-Ion Batteries

Advanced Carbons Nanofibers‐Based Electrodes for Flexible Energy Storage Devices

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A flexible free-standing cathode based on graphene-like MoSe2 nanosheets anchored on N-doped carbon nanofibers for rechargeable aluminum-ion batteries

Cited by 19 publications

References 56 publications

High-Defect-Density Graphite for Superior-Performance Aluminum-Ion Batteries with Ultra-Fast Charging and Stable Long Life

High-Defect-Density Graphite for Superior-Performance Aluminum-Ion Batteries with Ultra-Fast Charging and Stable Long Life

Interlayer-Expanded MoS2/N-Doped Carbon with Three-Dimensional Hierarchical Architecture as a Cathode Material for High-Performance Aluminum-Ion Batteries

Advanced Carbons Nanofibers‐Based Electrodes for Flexible Energy Storage Devices

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Product

Resources

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Interlayer-Expanded MoS₂/N-Doped Carbon with Three-Dimensional Hierarchical Architecture as a Cathode Material for High-Performance Aluminum-Ion Batteries