Nature of extra capacity in MoS2 electrodes: Molybdenum atoms accommodate with lithium

Wang, Longlu; Zhang, Qingfeng; Zhu, Jingyi; Duan, Xidong; Xu, Zhi; Liu, Yutang; Yang, Hongguan; Lu, Bingan

doi:10.1016/j.ensm.2018.04.025

Cited by 228 publications

(147 citation statements)

References 56 publications

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“…To this end, it is crucial to develop cost‐effective and efficient energy storage devices. In a variety of energy storage technologies, rechargeable Li‐ion batteries (LIBs), owing to high energy density, have dominated the portable electronic market and developed into the main candidate to power electric vehicles and plug‐in hybrid electric vehicles . However, limited resources of lithium and the rising price may seriously prevent the applications of LIBs in large scale energy storage in the future ,.…”

Section: Introductionmentioning

confidence: 99%

Low‐Cost Layered K_0.45Mn_0.9Mg_0.1O₂ as a High‐Performance Cathode Material for K‐Ion Batteries

et al. 2019

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Novel, potassium‐deficient, layered P3‐K0.45Mn0.9Mg0.1O2 is successfully prepared through a simple solid‐state reaction method; its electrochemical performance as a cathode material for K‐ion batteries is explored for the first time. The as‐prepared K0.45Mn0.9Mg0.1O2 delivers a high reversible capacity of 108 mAh g−1 at a current density of 20 mA g−1 in the potential region from 1.5 to 4.0 V. Moreover, the cyclability is enhanced by Mg substitution. After 100 cycles, the capacity of K0.45Mn0.9Mg0.1O2 can remain at about 80.8 mAh g−1 at 20 mA g−1. It also presents an excellent rate performance of 69.8 mAh g−1 even at a high current density of 200 mA g−1. Furthermore, the potassium storage mechanism is studied by using the ex situ XRD technique. These results contribute to the development of rechargeable K‐ion batteries based on earth‐abundant elements.

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Section: Introductionmentioning

confidence: 99%

Low‐Cost Layered K_0.45Mn_0.9Mg_0.1O₂ as a High‐Performance Cathode Material for K‐Ion Batteries

et al. 2019

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“…[28] Therefore, it is necessary to optimize and improve the electrochemical performance of the battery by studying the reaction mechanism. [33][34][35][36][37][38][39][40] The inadequacies are also obvious, including volume expansion, agglomeration, low ion-diffusion coefficient, and side reaction during discharge/charge, resulting in the rapid decay of capacity. [33][34][35][36][37][38][39][40] The inadequacies are also obvious, including volume expansion, agglomeration, low ion-diffusion coefficient, and side reaction during discharge/charge, resulting in the rapid decay of capacity.…”

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confidence: 99%

Nature of FeSe₂/N‐C Anode for High Performance Potassium Ion Hybrid Capacitor

Wang

et al. 2019

Advanced Energy Materials

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In addition, in-depth understanding of the nature of electrode material is an essential step in the development of electrode materials. [21][22][23][24] The electrode materials play a vital role in the battery. [25,26] During the deintercalation and conversion reactions, the electrode material is subjected to various physical and chemical changes, such as phase transitions and electrochemical reorganization. [27] These series of physical and chemical changes will affect the electrochemical performance. [28] Therefore, it is necessary to optimize and improve the electrochemical performance of the battery by studying the reaction mechanism. [29][30][31][32] Transition metal dichalcogenides (TMDs) have gained comprehensive attention in the field of energy storage due to their unique electrochemical properties, high electrical conductivity, and high capacity. [33][34][35][36][37][38][39][40] The inadequacies are also obvious, including volume expansion, agglomeration, low ion-diffusion coefficient, and side reaction during discharge/charge, resulting in the rapid decay of capacity. [41] To achieve high performance rechargeable batteries, it is important to understand the physical and chemical changes in electrode materials during the charge/discharge process. Researchers have made remarkable progress. [42] Usually TMDs involve a multi-step reaction mechanism as anode material for lithium ion batteries and sodium ion batteries (intercalation and conversion). [43][44][45] However, the physical and chemical changes in these TMDs in the potassium ion batteries are still not clear, which hinders the design and development of electrode materials. Therefore, exploring the reaction mechanism of metal selenide not only allows us to understand the relationship between TMDs and K + , but also achieve a long life cycle that would be a breakthrough for large-scale energy storage equipment.Herein, we successfully synthesized carbon-coated FeSe 2 clusters via a solvothermal method. The FeSe 2 clusters are well wrapped by the carbon layer, which improves electron conductivity and alleviates volume expansion. Benefiting from the unique structure, FeSe 2 /N-C exhibit ultra-stable cycle performance with a reversible capacity of up to 170 mAh g −1 at a high current of 2000 mA g −1 , which remains ≈158 mAh g −1 after 2000 cycles. The capacity retention is close to 100%. The electrodes also show remarkable rate performance. Furthermore, first-principles calculations, in situ X-ray diffraction, and ex situ transmission electron microscopy (in situ XRD and ex-TEM) Potassium ion hybrid capacitors have great potential for large-scale energy devices, because of the high power density and low cost. However, their practical applications are hindered by their low energy density, as well as electrolyte decomposition and collector corrosion at high potential in potassium bis(fluoro-sulfonyl)imide-based electrolyte. Therefore, anode materials with high capacity, a suitable voltage platform, and stability become a key factor. Here, N-doping carbon-co...

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“…Several metal oxides and sulfides as potential anode materials, such as SnO 2 , MoO 3 and MoS 2 etc., have been widely studied due to their higher specific capacity than graphite . In addition, other kinds of carbonaceous materials, for example carbon nanofiber (CNF), carbon nanotube (CNT) and graphene, also possess higher specific capacities than graphite .…”

Section: Introductionmentioning

confidence: 99%

Carbon nanofiber activated by molybdenum disulfide as an effective binder‐free composite anode for highly reversible lithium storage

Liu

Sun

et al. 2020

Int J Energy Res

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Summary Carbon nanofiber film (CNF) as anode material for lithium‐ion batteries (LIBs) draws attention for its excellent cyclic stability, but its practical application is limited due to low specific capacity. Considering the advantages of pure CNF and MoS2, a flexible film which CNF covered by MoS2 (MoS2/CNF) is successfully produced and evaluated as a binder‐free electrode for LIBs without mixing with carbon black and polymer binder. MoS2 nanoflakes (8.91 wt% of the composite sample) covering on CNF (MoS2/CNF‐B sample) plays the key role in activating the electrochemical properties of CNF, but dense MoS2 nanoflakes (39.4 wt%) on CNF (MoS2/CNF‐A) seriously limit the electrochemical properties of CNF. At 0.1 and 1.0 A g−1, MoS2/CNF‐B sample delivers 967.1 and 605.7 mA h g−1, the capacities are almost twice as much as those of pure CNF. The initial columbic efficiency of MoS2/CNF‐B sample of 76.4% is much higher than that of pure CNF sample of 62.1%. Moreover, MoS2/CNF‐B sample presents no capacity decay till 100 cycles, and the cycled electrode at the 100th cycle still maintains a stable composite structure of MoS2 nanoflakes covering on CNF.

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Nature of extra capacity in MoS2 electrodes: Molybdenum atoms accommodate with lithium

Cited by 228 publications

References 56 publications

Low‐Cost Layered K_0.45Mn_0.9Mg_0.1O₂ as a High‐Performance Cathode Material for K‐Ion Batteries

Low‐Cost Layered K_0.45Mn_0.9Mg_0.1O₂ as a High‐Performance Cathode Material for K‐Ion Batteries

Nature of FeSe₂/N‐C Anode for High Performance Potassium Ion Hybrid Capacitor

Carbon nanofiber activated by molybdenum disulfide as an effective binder‐free composite anode for highly reversible lithium storage

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Nature of extra capacity in MoS2 electrodes: Molybdenum atoms accommodate with lithium

Cited by 228 publications

References 56 publications

Low‐Cost Layered K0.45Mn0.9Mg0.1O2 as a High‐Performance Cathode Material for K‐Ion Batteries

Low‐Cost Layered K0.45Mn0.9Mg0.1O2 as a High‐Performance Cathode Material for K‐Ion Batteries

Nature of FeSe2/N‐C Anode for High Performance Potassium Ion Hybrid Capacitor

Carbon nanofiber activated by molybdenum disulfide as an effective binder‐free composite anode for highly reversible lithium storage

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Low‐Cost Layered K_0.45Mn_0.9Mg_0.1O₂ as a High‐Performance Cathode Material for K‐Ion Batteries

Low‐Cost Layered K_0.45Mn_0.9Mg_0.1O₂ as a High‐Performance Cathode Material for K‐Ion Batteries

Nature of FeSe₂/N‐C Anode for High Performance Potassium Ion Hybrid Capacitor