Boosting the rate capability of hard carbon with an ether-based electrolyte for sodium ion batteries

Zhu, Yuan-En; Liu, Yang; Zhou, Zhen; Liu, Feng; Wei, Jinping

doi:10.1039/c7ta02515g

Cited by 150 publications

(99 citation statements)

References 33 publications

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“…[39] In the following cycles, the GCD curves using EP-KPF and DME-KFSI electrolytes almost overlap, indicating that Sb 2 O 3 -RGO exhibits stability in initial several cycles. [40] Figure S7, Supporting Information, shows the electrochemical impedance spectroscopies (EIS) of Sb 2 O 3 -RGO electrode using EP-KPF and DME-KFSI before and after 100 cycles. In Figure 2e, the battery using Adv.…”

Section: Resultsmentioning

confidence: 99%

K‐Ion Storage Enhancement in Sb₂O₃/Reduced Graphene Oxide Using Ether‐Based Electrolyte

Zhuang

Xie

et al. 2019

Advanced Energy Materials

119

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In this work, an ether‐based electrolyte is adopted instead of conventional ester‐based electrolyte for an Sb2O3‐based anode and its enhancement mechanism is unveiled for K‐ion storage. The anode is fabricated by anchoring Sb2O3 onto reduced graphene oxide (Sb2O3‐RGO) and it exhibits better electrochemical performance using an ether‐based electrolyte than that using a conventional ester‐based electrolyte. By optimizing the concentration of the electrolyte, the Sb2O3‐RGO composite delivers a reversible specific capacity of 309 mAh g−1 after 100 cycles at 100 mA g−1. A high specific capacity of 201 mAh g−1 still remains after 3300 cycles (111 days) at 500 mA g−1 with almost no decay, exhibiting a longer cycle life compared with other metallic oxides. In order to further reveal the intrinsic mechanism, the energy changes for K atom migrating from surface into the sublayer of Sb2O3 are explored by density functional theory calculations. According to the result, the battery using the ether‐based electrolyte exhibits a lower energy change and migration barrier than those using other electrolytes for K‐ion, which is helpful to improve the K‐ion storage performance. It is believed that the work can provide deep understanding and new insight to enhance electrochemical performance using ether‐based electrolytes for KIBs.

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Section: Resultsmentioning

confidence: 99%

K‐Ion Storage Enhancement in Sb₂O₃/Reduced Graphene Oxide Using Ether‐Based Electrolyte

Zhuang

Xie

et al. 2019

Advanced Energy Materials

119

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“…[10,11] Because of the existence of al ow potentialo fe lectrochemical transformation of graphitic carbon upon reaction with alkali metals,m ost of the carbons (graphite, hard carbons, soft carbons, and other aromatic ring types) qualifyf or this basic electrochemical norm. [13,[16][17][18][19][20] Unlike LiC 6 in the case of LIBs, ah igh-capacity intercalation compound of Na with defect-free graphite is nonexistent.A bi nitio calculations by Ts ai et al also suggested the existence of thermodynamic limitations to the formationo f NaC 6 in the case of graphite. [13,[16][17][18][19][20] Unlike LiC 6 in the case of LIBs, ah igh-capacity intercalation compound of Na with defect-free graphite is nonexistent.A bi nitio calculations by Ts ai et al also suggested the existence of thermodynamic limitations to the formationo f NaC 6 in the case of graphite.…”

Section: Introductionmentioning

confidence: 99%

Hard Carbons for Sodium‐Ion Battery Anodes: Synthetic Strategies, Material Properties, and Storage Mechanisms

et al. 2018

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Sodium-ion batteries are attracting much interest due to their potential as viable future alternatives for lithium-ion batteries, in view of the much higher earth abundance of sodium over that of lithium. Although both battery systems have basically similar chemistries, the key celebrated negative electrode in lithium battery, namely, graphite, is unavailable for the sodium-ion battery due to the larger size of the sodium ion. This need is satisfied by "hard carbon", which can internalize the larger sodium ion and has desirable electrochemical properties. Unlike graphite, with its specific layered structure, however, hard carbon occurs in diverse microstructural states. Herein, the relationships between precursor choices, synthetic protocols, microstructural states, and performance features of hard carbon forms in the context of sodium-ion battery applications are elucidated. Derived from the pertinent literature employing classical and modern structural characterization techniques, various issues related to microstructure, morphology, defects, and heteroatom doping are discussed. Finally, an outlook is presented to suggest emerging research directions.

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“…[23,64] In this contextr esides the motivation to find as uitable strategyf or the production of high-performance and sustainable lignocellulosic (peanut shells)-derived hard carbon as anodes for SIBs. [39,60,62] Additionally, al ong acid treatment enablest he use of lower synthesis temperature, thus making the hard carbon production greener and more sustainable.…”

Section: Introductionmentioning

confidence: 99%

Impact of the Acid Treatment on Lignocellulosic Biomass Hard Carbon for Sodium‐Ion Battery Anodes

et al. 2018

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The investigation of phosphoric acid treatment on the performance of hard carbon from a typical lignocellulosic biomass waste (peanut shell) is herein reported. A strong correlation is discovered between the treatment time and the structural properties and electrochemical performance in sodium-ion batteries. Indeed, a prolonged acid treatment enables the use of lower temperatures, that is, lower energy consumption, for the carbonization step as well as improved high-rate performance (122 mAh g at 10 C).

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Boosting the rate capability of hard carbon with an ether-based electrolyte for sodium ion batteries

Cited by 150 publications

References 33 publications

K‐Ion Storage Enhancement in Sb₂O₃/Reduced Graphene Oxide Using Ether‐Based Electrolyte

K‐Ion Storage Enhancement in Sb₂O₃/Reduced Graphene Oxide Using Ether‐Based Electrolyte

Hard Carbons for Sodium‐Ion Battery Anodes: Synthetic Strategies, Material Properties, and Storage Mechanisms

Impact of the Acid Treatment on Lignocellulosic Biomass Hard Carbon for Sodium‐Ion Battery Anodes

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Boosting the rate capability of hard carbon with an ether-based electrolyte for sodium ion batteries

Cited by 150 publications

References 33 publications

K‐Ion Storage Enhancement in Sb2O3/Reduced Graphene Oxide Using Ether‐Based Electrolyte

K‐Ion Storage Enhancement in Sb2O3/Reduced Graphene Oxide Using Ether‐Based Electrolyte

Hard Carbons for Sodium‐Ion Battery Anodes: Synthetic Strategies, Material Properties, and Storage Mechanisms

Impact of the Acid Treatment on Lignocellulosic Biomass Hard Carbon for Sodium‐Ion Battery Anodes

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K‐Ion Storage Enhancement in Sb₂O₃/Reduced Graphene Oxide Using Ether‐Based Electrolyte

K‐Ion Storage Enhancement in Sb₂O₃/Reduced Graphene Oxide Using Ether‐Based Electrolyte