Surface-dominated potassium storage enabled by single-atomic sulfur for high-performance K-ion battery anodes

Yang, Guo‐Zhan; Chen, Yanfei; Feng, Bo; Ye, Chen-Xin; Ye, Xue-Bin; Jin, Hongchang; Zhou, En Ze; Zheng, Ze‐Lin; Zeng, Xian; Chen, Xueling; Bin, De‐Shan; A, Cao

doi:10.1039/d3ee00073g

Cited by 40 publications

(22 citation statements)

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“…We note here that the fast potassium storage ability of (S-BP)/G is also much better than the previously reported values for PIB anodes (Figure S14). ,,,,, Additionally, CV results (Figure S18) show that the current density corresponding to the reduction peak of (S-BP)/G of around 0.05 V is higher than that of BP/G, also indicative of a more complete K–P alloying reaction in (S-BP)/G, further supporting the positive role of sulfur-mediation in boosting the K–P alloying reaction. We further studied the impact of the sulfur dopant concentration on the electrochemical performance (Figure S19).…”

Section: Results and Discussionmentioning

confidence: 80%

Breaking Low-Strain and Deep-Potassiation Trade-Off in Alloy Anodes via Bonding Modulation for High-Performance K-Ion Batteries

Zhou,

Luo,

Jin

et al. 2024

J. Am. Chem. Soc.

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Alloy anode materials have garnered unprecedented attention for potassium storage due to their high theoretical capacity. However, the substantial structural strain associated with deep potassiation results in serious electrode fragmentation and inadequate K-alloying reactions. Effectively reconciling the trade-off between low-strain and deep-potassiation in alloy anodes poses a considerable challenge due to the larger size of K-ions compared to Li/Na-ions. In this study, we propose a chemical bonding modulation strategy through single-atom modification to address the volume expansion of alloy anodes during potassiation. Using black phosphorus (BP) as a representative and generalizing to other alloy anodes, we established a robust P−S covalent bonding network via sulfur doping. This network exhibits sustained stability across discharge−charge cycles, elevating the modulus of K−P compounds by 74%, effectively withstanding the high strain induced by the potassiation process. Additionally, the bonding modulation reduces the formation energies of potassium phosphides, facilitating a deeper potassiation of the BP anode. As a result, the modified BP anode exhibits a high reversible capacity and extended operational lifespan, coupled with a high areal capacity. This work introduces a new perspective on overcoming the trade-off between low-strain and deep-potassiation in alloy anodes for the development of high-energy and stable potassium-ion batteries.

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Section: Results and Discussionmentioning

confidence: 80%

Breaking Low-Strain and Deep-Potassiation Trade-Off in Alloy Anodes via Bonding Modulation for High-Performance K-Ion Batteries

Zhou,

Luo,

Jin

et al. 2024

J. Am. Chem. Soc.

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“…This observation could be attributed to the partial transformation of the solid electrolyte interface (SEI). 31,32 Significantly, peaks at 165.9 eV, 167.2 eV, 168.2eV and 169.4 eV for the S 2p orbital can be ascribed to the formation of an SEI film containing a S-rich organic/inorganic composite. 31,33,34…”

Section: Resultsmentioning

confidence: 99%

“…31,32 Significantly, peaks at 165.9 eV, 167.2 eV, 168.2eV and 169.4 eV for the S 2p orbital can be ascribed to the formation of an SEI film containing a S-rich organic/inorganic composite. 31,33,34…”

Section: Resultsmentioning

confidence: 99%

A robust conductive covalent organic framework for ultra-stable potassium storage

Li,

Xiao,

Xie

et al. 2023

J. Mater. Chem. A

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“…19,31,32 However, the effect of sulfur doping on ICE has rarely been reported. Additionally, previously reported sulfur-doped carbons usually contain multiple sulfur configurations (such as thiophene-type sulfur, C-SO x -C and C-SH), 33–35 which hinders the investigation of the role of thiophene-type sulfur in potassium ion storage.…”

Section: Introductionmentioning

confidence: 99%

Thiophene-sulfur doping in nitrogen-rich porous carbon enabling high-ICE/rate anode materials for potassium-ion storage

Qiu,

Kumar,

Qiu

et al. 2023

J. Mater. Chem. A

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Surface-dominated potassium storage enabled by single-atomic sulfur for high-performance K-ion battery anodes

Abstract: Due to the large size and heavy mass of K-ion, the pursuit of reliable anodes with outstanding comprehensive performance for K-ion batteries (KIBs) remains a formidable challenge. Typically, high-capacity potassium...

Cited by 40 publications

References 50 publications

Breaking Low-Strain and Deep-Potassiation Trade-Off in Alloy Anodes via Bonding Modulation for High-Performance K-Ion Batteries

Breaking Low-Strain and Deep-Potassiation Trade-Off in Alloy Anodes via Bonding Modulation for High-Performance K-Ion Batteries

A robust conductive covalent organic framework for ultra-stable potassium storage

Thiophene-sulfur doping in nitrogen-rich porous carbon enabling high-ICE/rate anode materials for potassium-ion storage

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