Boosting the Potassium Storage Performance of Alloy‐Based Anode Materials via Electrolyte Salt Chemistry

Zhang, Qing; Mao, Jianfeng; Pang, Wei Kong; Zheng, Tian; Sencadas, Vítor; Chen, Yuanzhen; Liu, Huan; Guo, Zaiping

doi:10.1002/aenm.201703288

Cited by 390 publications

(405 citation statements)

References 56 publications

Supporting

Mentioning

397

Contrasting

Order By: Relevance

“…The d-spacing is about 0.33 nm, which matches well with the (012) facet of Bi (JCPDS 1-688). [14] The other elements spectra such as Na 1s, F 1s, and C 1s could also be clearly seen in Figure S1. As shown in Figure 2c, the Bi 4 f spectra show two fully split peaks at 159 and 165 eV, implying the presence of Bi metal.…”

Section: In Situ Synthesis Of a Bismuth Layer On A Sodium Metal Anodementioning

confidence: 81%

In situ Synthesis of a Bismuth Layer on a Sodium Metal Anode for Fast Interfacial Transport in Sodium‐Oxygen Batteries

Lü

Yan

2019

Batteries & Supercaps

View full text Add to dashboard Cite

Na metal has shown great promise as anode material for Nabased batteries due to its high theoretical capacity, low potential, high abundance, and low cost. However, the uneven solid electrolyte interphase layer formed on the Na anode surface caused by side reactions with the electrolyte and serious corrosion will lead to dendrite formation and safety issues. Here we report a stable Na anode by coating a Bi layer, which is formed in situ through simple ion-exchange. The compact Bi layer can effectively prevent Na reacting with the electrolyte and suppress the formation of dendrites. The Na/Bi anode exhibits high exchange current densities and fast chargetransfer kinetics. As a result, the overpotential of the symmetric cells using this Na/Bi electrode does not increase obviously after cycling for 1000 h at a current density of 0.5 mA cm À 2 . Moreover, the NaÀ O 2 batteries with Na/Bi anode can run for 50 cycles. The presented surface coating approach provides a new strategy to protect Na anodes in Na-based batteries.Na-based battery systems are considered as promising alternative candidates for large-scale energy storage owing to the high abundance and low cost of Na resources. [1] Among the anodes for Na battery systems, Na metal shows the lowest potential (À 2.714 V vs. SHE) and the highest theoretical specific capacity (1165 mA h g À 1 ). [2] Furthermore, Na metal anode can be directly used for the high-energy-density battery systems such as NaÀ S batteries, [3] NaÀ CO 2 batteries, [4] and NaÀ O 2 batteries. [5] However, Na metal anode is plagued by many problems because of its intrinsic active chemical property. As a result of the reaction between organic solvent-based electrolyte and Na, unstable solid electrolyte interphase (SEI) would be formed during repeated charge/discharge cycles (Figure 1a). The reformation of SEI and uncontrolled Na dendrites can easily penetrate the separator and accelerate the loss of electrolyte and Na, resulting in short circuit of the batteries and safety accident. [6] In particular, this problem will be more serious under O 2 atmosphere because O 2 shows a stronger affinity for Na anode. [7] Ether-based electrolyte is considered as one of the best systems for high-energy Na batteries due to the formation of a uniform SEI. [8] However, Sun's group showed that this SEI cannot maintain its stability at high current densities. [9a] Therefore, a successful SEI is critical for the electrochemical performance of Na anode. The ideal SEI should exhibit good properties such as tight contact with the electrode, high uniformity, stable mechanical and electrochemical properties, and high interfacial conductivity during stripping/plating. Previous works have revealed that constructing artificial SEI membranes (e. g., atomic Al 2 O 3 layer, [9] ultrathin grapheme films, [10] inorganic-organic composite layer [11] and ionic liquid [12] ) on the surface of Na can effectively protect Na metal. But these methods are relatively complicated and expensive, limiting their further applicatio...

show abstract

Section: In Situ Synthesis Of a Bismuth Layer On A Sodium Metal Anodementioning

confidence: 81%

In situ Synthesis of a Bismuth Layer on a Sodium Metal Anode for Fast Interfacial Transport in Sodium‐Oxygen Batteries

Lü

Yan

2019

Batteries & Supercaps

View full text Add to dashboard Cite

show abstract

“…been demonstrated to be comparable to the lithium intercalation chemistry of LIBs; thus, the established system for LIBs can be more smoothly transferred to KIBs than to other rechargeable batteries. 5,6 Reflecting on these situations, several positive and negative electrodes were introduced.…”

Section: Introductionmentioning

confidence: 99%

Development of P3-K_0.69CrO₂ as an ultra-high-performance cathode material for K-ion batteries

Hwang

Kim

et al. 2018

Energy Environ. Sci.

161

124

View full text Add to dashboard Cite

and exhibited the best cycling performance for a KIB cathode material to date. A combination of electrochemical profiles, ex situ X-ray diffraction, and first-principles calculations was used to understand the overall potassium storage mechanism of P3-K 0.69 CrO 2 . Based on a reversible phase transition, P3-K 0.69 CrO 2 delivers a high discharge capacity of 100 mA h g À1 and exhibits extremely high cycling stability with B65% retention over 1000 cycles at a 1C rate. Moreover, the K-ion hopping into the P3-K 0.69 CrO 2 structure was extremely rapid, resulting in great power capability of up to a 10C rate with a capacity retention of B65% (vs. the capacity at 0.1C).

show abstract

“…(C) Comparison of the cycling stability of RP/C electrodes with various previously reported anodes for KIBs. Current density: 50 mA/g‐black P (BP)/graphite, amorphous black P/carbon (P‐C), Sn 4 P 3 @carbon fibers (Sn 4 P 3 /C), Bi/rGO and RP/C (this work); 100 mA/g‐RP@carbon nanosheet (RP@CN), nanoporous Sb (NP‐Sb) and cobalt hexacyanocobaltate (Co 3 [Co(CN) 6 ] 2 ); 200 mA/g‐VSe 2 , MoSe 2 /C and CoSe 2 /N‐doped CNT; 500 mA/g‐antimony sulfide/carbon sheet (Sb 2 S 3 /C) . The specific capacity of RP@CN and Sn 4 P 3 /C was given based on the mass of phosphorus‐based active materials.…”

Section: Figurementioning

confidence: 97%

Electrolyte Chemistry Enables Simultaneous Stabilization of Potassium Metal and Alloying Anode for Potassium‐Ion Batteries

Wang

et al. 2019

Angewandte Chemie

View full text Add to dashboard Cite

Alloying anodes are promising high‐capacity electrode materials for K‐ion batteries (KIBs). However, KIBs based on alloying anodes suffer from rapid capacity decay due to the instability of K metal and large volume expansion of alloying anodes. Herein, the effects of salts and solvents on the cycling stability of KIBs based on a typical alloying anode such as amorphous red phosphorus (RP) are investigated, and the potassium bis(fluorosulfonyl)imide (KFSI) salt‐based carbonate electrolyte is versatile to achieve simultaneous stabilization of K metal and RP electrodes for highly stable KIBs. This salt‐solvent complex with a moderate solvation energy can alleviate side reactions between K metal and the electrolyte and facilitate K+ ion diffusion/desolvation. Moreover, robust SEI layers that form on K metal and RP electrodes can suppress K dendrite growth and resist RP volume change. This strategy of electrolyte regulation can be applicable to other alloying anodes for high‐performance KIBs.

show abstract

Boosting the Potassium Storage Performance of Alloy‐Based Anode Materials via Electrolyte Salt Chemistry

Cited by 390 publications

References 56 publications

In situ Synthesis of a Bismuth Layer on a Sodium Metal Anode for Fast Interfacial Transport in Sodium‐Oxygen Batteries

In situ Synthesis of a Bismuth Layer on a Sodium Metal Anode for Fast Interfacial Transport in Sodium‐Oxygen Batteries

Development of P3-K_0.69CrO₂ as an ultra-high-performance cathode material for K-ion batteries

Electrolyte Chemistry Enables Simultaneous Stabilization of Potassium Metal and Alloying Anode for Potassium‐Ion Batteries

Contact Info

Product

Resources

About

Boosting the Potassium Storage Performance of Alloy‐Based Anode Materials via Electrolyte Salt Chemistry

Cited by 390 publications

References 56 publications

In situ Synthesis of a Bismuth Layer on a Sodium Metal Anode for Fast Interfacial Transport in Sodium‐Oxygen Batteries

In situ Synthesis of a Bismuth Layer on a Sodium Metal Anode for Fast Interfacial Transport in Sodium‐Oxygen Batteries

Development of P3-K0.69CrO2 as an ultra-high-performance cathode material for K-ion batteries

Electrolyte Chemistry Enables Simultaneous Stabilization of Potassium Metal and Alloying Anode for Potassium‐Ion Batteries

Contact Info

Product

Resources

About

Development of P3-K_0.69CrO₂ as an ultra-high-performance cathode material for K-ion batteries