Superior potassium storage behavior of hard carbon facilitated by ether-based electrolyte

Dai, Haodong; Zeng, Zizhuo; Yang, Xiangpeng; Jiang, Mingjuehui; Wang, Yu; Huang, Qinghong; Liu, Lili; Fu, Lijun; Zhang, Peng; Wu, Yuping

doi:10.1016/j.carbon.2021.03.058

Cited by 24 publications

(14 citation statements)

References 43 publications

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“…And the positive correlation between graphitization degree and plateau capacity (Figure 3b), indicating Na‐ions can be inserted into the graphene layer to form NaC x compounds [25b,27a, 30c, 31] . Besides, there is an irreversible peak located at 0.8 V during the first cathodic scan, which is attributed to the decomposition of electrolyte and sodium salts [32] . The overlapping redox peaks in the subsequent cycles prove the excellent reversibility of H1100 during sodiation/desodiation process.…”

Section: Resultsmentioning

confidence: 91%

“…[25b,27a, 30c, 31] Besides, there is an irreversible peak located at 0.8 V during the first cathodic scan, which is attributed to the decomposition of electrolyte and sodium salts. [32] The overlapping redox peaks in the subsequent cycles prove the excellent reversibility of H1100 during sodiation/desodiation process. The electrochemical active voltage position is further verified by analyzing dQ/dV curves (Figure 5b).…”

Section: Chemelectrochemmentioning

confidence: 95%

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N/O Co‐Doped Hard Carbon Derived from Cocklebur Fruit for Sodium‐Ion Storage

Shi

Han

et al. 2022

ChemElectroChem

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Hard carbon is one of the most promising anode materials for sodium-ion batteries (SIBs). However, it still faces the obstacle of low reversible capacity. Modifying the carbon skeleton with heteroatoms is an effective method to improve the electrochemical properties of carbon electrodes. Herein, cocklebur fruit, a plant which is rich in natural alkaloids, is selected as the precursor to prepare N/O co-doped hard carbon. The obtained sample pyrolyzed at 1100 °C (H1100) can exhibit 366.07 mAh g À 1 specific discharge capacity and 69.08 % initial coulombic efficiency. The balance between the suitable configuration of N/ O groups and graphitization forms a carbon material with a high sodium-ion storage capability. The storage mechanism is analyzed by cyclic voltammetry (CV), differential capacity (dQ/ dV), galvanostatic intermittent titration technique (GITT), and ex-situ Raman. The results show that the sodium ions are first adsorbed on defect sites, then filled with micropores and embedded in graphite sheets.

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Section: Resultsmentioning

confidence: 91%

Section: Chemelectrochemmentioning

confidence: 95%

N/O Co‐Doped Hard Carbon Derived from Cocklebur Fruit for Sodium‐Ion Storage

Shi

Han

et al. 2022

ChemElectroChem

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“…d) A comparison of the electrochemical performance of the hard carbon anode of PIBs. [ 31,33,35,38,44–46 ]…”

Section: Resultsmentioning

confidence: 99%

“…The CS exhibits an advanced or comparable capacity to state‐of‐the‐art works, particularly at large current densities. [ 31,33,35,38,44–46 ]…”

Section: Resultsmentioning

confidence: 99%

Fast Intercalation in Locally Ordered Carbon Nanocrystallites for Superior Potassium Ions Storage

Han

Chen

Zhang

et al. 2021

Adv Funct Materials

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Hard carbons (HCs) have great potential as anode material for high‐performance potassium ion batteries (PIBs). However, due to the complexity of HCs, the relationship between their structures and potassium (K) storage behaviors is still not quite clear. Here, three types of HCs with different structures are designed for further understanding the electrochemical storage processes. Among them, the carbon spheres (CS) exhibit impressive rate performance (161.6 mAh g−1 at 2 A g−1) and cycle stability (140.2 mAh g−1 at 2 A g−1 after 500 cycles). The superior performance of CS can be mainly ascribed to the intercalation into its locally‐ordered carbon nanocrystallites, and the charge/discharge processes are further characterized with significant pseudocapacitive dominating. Suitable nanocrystalline size and the ratio of defects with proper morphology are the key factors to improve K storage efficiency. This work will contribute to understanding the role of these factors in the K storage performance of carbon materials.

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“…Dai et al also compared the electrochemical performance of carbon anodes in PIBs with ester‐ and ether‐based electrolytes. [ 203 ] It showed the PIBs with ether electrolyte can deliver higher ICE, higher rate capacity, higher cycling stability than those with ester electrolyte. Ether‐derived SEI exhibited a thin and mechanical stable layer consisting of polyether, RCH 2 OK, KOH, KF, and KPF 6 , whereas a thicker and unstable SEI formed in ester electrolyte with composition of polyester, K 2 CO 3 and unstable ROCO 2 K. [ 204 ] These compositional and structural differences are responsible for the distinct performances of PIBs with different electrolyte solvents.…”

Section: Solid Electrolyte Interface In Carbon Anodesmentioning

confidence: 99%

Advances in Carbon Materials for Sodium and Potassium Storage

Liu

Wang

et al. 2022

Adv Funct Materials

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Over the past decades, ground‐breaking techniques and transformative progress have been achieved on exploring alternative battery candidates beyond lithium‐ion batteries, among which sodium‐/potassium‐ion batteries (SIBs/PIBs) are receiving rapidly increased attention. Great efforts have been devoted to developing verified anode materials. Carbon materials take the leading position because of their abundance, low‐cost, environmental friendless, and commercial potential. While it is easy to understand which specific carbon material exhibits outstanding performance, the understanding of electrochemical reaction mechanisms, the structure–performance relation, and the interfacial properties of carbon anodes are rather difficult. It is urgently required to comprehensively summarize and further compare these fundamental issues, but it is still insufficient. This review concentrates on recent progress of carbon materials for SIBs and PIBs, and at the beginning summarizes the fabrication and characterization of different carbon allotropes, then fundamentally compares the ion storage mechanisms and interfacial chemistries. Furthermore, the relationship between the mechanism‐oriented and interface‐correlated performance and material optimization strategies is established. Finally, critical challenges and future developments of carbon anodes for the practical realization of SIBs/PIBs are proposed. This review gives a comprehensive summary and perspective from mechanisms to material design, offering a reliable guidance of carbon materials for SIBs and PIBs.

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Superior potassium storage behavior of hard carbon facilitated by ether-based electrolyte

Cited by 24 publications

References 43 publications

N/O Co‐Doped Hard Carbon Derived from Cocklebur Fruit for Sodium‐Ion Storage

N/O Co‐Doped Hard Carbon Derived from Cocklebur Fruit for Sodium‐Ion Storage

Fast Intercalation in Locally Ordered Carbon Nanocrystallites for Superior Potassium Ions Storage

Advances in Carbon Materials for Sodium and Potassium Storage

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