Effects of functional binders on electrochemical performance of graphite anode in potassium-ion batteries

Wu, Xuan; Xing, Zheng; Hu, Yi; Ya, Zhang; Sun, Yongwen; Ju, Zhicheng; Liu, Jinlong; Zhuang, Quanchao

doi:10.1007/s11581-018-2763-4

Cited by 43 publications

(29 citation statements)

References 63 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…Wu et al also investigated the effects of functional binders on graphite in KIBs. [35] They also found that in the aqueous system binders including CMC and PANa could decrease the electrolyte decomposition on the surface of graphite particle, which contributed to the restriction of the capacity fading.…”

Section: Selection Of Appropriate Bindermentioning

confidence: 99%

Graphite Anode for Potassium Ion Batteries: Current Status and Perspective

et al. 2021

Energy & Environ Materials

View full text Add to dashboard Cite

Currently, the commercial Li-ion batteries (LIBs) have received much attention and hold a dominant position in portable device and electric vehicles fields. [1][2][3] However, the shortage of Li resources (only 20 ppm reserves in the crust) and uneven geographical distribution (mainly distributed in South America) result in the high price of LIBs. [4][5][6] With the growing demand of energy storage system, especially for the large-scale fixed power supply applications, LIBs will struggle to compete economically in large-scale energy storage system. [7] These challenges underlie further research into alternative, sustainable, and inexpensive battery technologies. Compared with Li resources, the abundance of Na and K in the crust appears to be infinite, as shown in Figure 1a. [8,9] In the past years, Na-ion batteries (NIBs) have received much attention, which should be due to the similar reaction mechanism to LIBs. [10][11][12] Due to the relatively high standard reduction potential of Na/Na + (−2.71 V vs standard hydrogen electrode [SHE]), NIBs always suffer the low energy density, which astricts the further practical applications. [13][14][15] Considering this issue, K-ion batteries are also raised, which should be due to the relatively low standard reduction potential of K/K + (−2.93 V vs SHE), closing to that of Li/Li + (−3.04 V vs SHE), as shown in Figure 1b. [16,17] This result indicates that KIBs will present higher energy density than that of NIBs. In addition, compared with Li-ion (4.8 Å) and Na-ion (4.6 Å), K-ion always presents a smaller Stokes' radius of (3.6 Å) in conventional propylene carbonate solvent (Figure 1d), illustrating that a higher ion conductivity and mobility can be received in battery system. [18] Therefore, KIBs also have won lots of attention and the publications involving KIBs have been rapidly raised, as shown in Figure 1c. Figure 1f shows the schematic illustration of KIBs, which presents the "rocking-chair" working mechanism of K-ion storage. [19] The K-ion acts as the shuttles, which is exchanged between the cathode and the anode. During the charging process, the K-ion is deintercalated from cathode and then intercalate into the interlamination of anode, which accompanies with the energy storage. While the depotassiation process, an inverted reaction happens, which is along with the energy supply. However, compared with the sizes of Li-ion (0.76 Å) and Na-ion (0.97 Å), the oversize of K-ion (1.38 Å) always leads to the distinct structure damage of anode materials during the potassiation-depotassiation process, which will trigger the obvious capacity decay in the subsequent cycles. [20] Therefore, developing high-performance anode materials for KIBs becomes an important goal in energy storage field.Currently, large numbers of anode materials including metals, oxides, sulfides, phosphides for KIBs have been reported, which present superior performance for K-ion storage. [21][22][23][24][25][26] In spite of these, the cycling stability and the relatively higher voltage plateau also r...

show abstract

Section: Selection Of Appropriate Bindermentioning

confidence: 99%

Graphite Anode for Potassium Ion Batteries: Current Status and Perspective

et al. 2021

Energy & Environ Materials

View full text Add to dashboard Cite

show abstract

“…At 0.5 V, a new intermediate state KC 24 appeared. Finally, XRD diffraction peak at 33.4°suggested the formation of KC 8 at 0.01 V. [17] Therefore, the following (de)potassiation reaction could be deduced (KC 36 $ KC 24 $ KC 8 ). Interestingly, these peaks between 27°-33°could be indexed to K 3 F 2 (PO 3 ) occurring in almost all states of charge for electrode, which could be attributed to the formation of SEI film.…”

Section: Resultsmentioning

confidence: 93%

“…Some analogous features were also proven by galvanostatic charge‐discharge profiles, where initial charge/discharge capacities of 524.8 and 946.4 mAh g −1 have been provided at a current density of 100 mA g −1 (Figure 3b), with an initial coulombic efficiency (ICE) of 55.5 % which was ascribed to high specific surface area and surface defects, causing ion traps and forming more SEI film in the initial cycle. The low ICE could be addressed by the pre‐potassiation, adjustment of defect concentration, [35] and binder optimization [36] . After the initial cycle, the profiles highly overlapped and displayed a redox platform (red arrows), greatly raising the potential platform of potassium intercalation and effectively avoiding the risk of potassium dendrite.…”

Section: Resultsmentioning

confidence: 99%

“…The low ICE could be addressed by the pre-potassiation, adjustment of defect concentration, [35] and binder optimization. [36] After the initial cycle, the profiles highly overlapped and displayed a redox platform (red arrows), greatly raising the potential platform of potassium intercalation and effectively avoiding the risk of potassium dendrite. After 250 cycles, SN-CNSs electrode delivered a reversible capacity of 258.2 mAh g À 1 at 0.5 A g À 1 , with no obvious capacity loss from 50th cycle, implying the good reversibility of such a doped carbon (Figure S7).…”

Section: Resultsmentioning

confidence: 99%

See 1 more Smart Citation

Sulfur/Nitrogen Co‐Doped In‐Plane Porous Carbon Nanosheets as Superior Anode of Potassium‐Ion Batteries

Zhong

et al. 2022

Batteries & Supercaps

View full text Add to dashboard Cite

Carbonaceous materials are regarded as prospective anode candidates of potassium‐ion batteries. However, the rate capability and cycling stability of classic carbon materials are still far from satisfactory. Herein, we exploit a facile and low‐cost strategy to enable the precise synthesis of sulfur/nitrogen co‐doped in‐plane porous carbon nanosheets with fishnet‐shaped microstructure (SN‐CNSs). The well‐designed in‐plane porous structure and the interconnected carbon flake network can accelerate the diffusion of potassium ions, alleviate volume expansion, and provide sufficient active sites. As a result, the SN‐CNSs deliver an impressively reversible capacity of 248 mAh g−1 at a current density of 1 A g−1 after 4500 cycles, and an excellent rate capacity of 137.3 mAh g−1 after 4000 cycles under 5 A g−1. Density functional theory (DFT) calculations further verify the advantage of S/N co‐doping in the adsorption/diffusion of K‐ion in SN‐CNSs materials. Such an excellent performance shows that SN‐CNSs possess a great potential to be a superior anode of potassium‐ion batteries.

show abstract

“…PVDF, cellulose, PAN, PP, and PEO are used as reinforcing agents and electrochemical stabilizers. Polyacrylate sodium (PAAN) binder, with appreciable enlargement, mechanical strength, and sturdy molecular adhesion, is a promising candidate for restraining the volume occupancy and repetitive electrolyte degradation [450]. The most crucial issue of the K-ion battery is the flammability due to dendrite growth and buffer volume.…”

Section: Optimizing Solvent Formulationsmentioning

confidence: 99%

Growth Mechanism of Micro/Nano Metal Dendrites and Cumulative Strategies for Countering Its Impacts in Metal Ion Batteries: A Review

et al. 2021

View full text Add to dashboard Cite

Metal-ion batteries are capable of delivering high energy density with a longer lifespan. However, they are subject to several issues limiting their utilization. One critical impediment is the budding and extension of solid protuberances on the anodic surface, which hinders the cell functionalities. These protuberances expand continuously during the cyclic processes, extending through the separator sheath and leading to electrical shorting. The progression of a protrusion relies on a number of in situ and ex situ factors that can be evaluated theoretically through modeling or via laboratory experimentation. However, it is essential to identify the dynamics and mechanism of protrusion outgrowth. This review article explores recent advances in alleviating metal dendrites in battery systems, specifically alkali metals. In detail, we address the challenges associated with battery breakdown, including the underlying mechanism of dendrite generation and swelling. We discuss the feasible solutions to mitigate the dendrites, as well as their pros and cons, highlighting future research directions. It is of great importance to analyze dendrite suppression within a pragmatic framework with synergy in order to discover a unique solution to ensure the viability of present (Li) and future-generation batteries (Na and K) for commercial use.

show abstract

Effects of functional binders on electrochemical performance of graphite anode in potassium-ion batteries

Cited by 43 publications

References 63 publications

Graphite Anode for Potassium Ion Batteries: Current Status and Perspective

Graphite Anode for Potassium Ion Batteries: Current Status and Perspective

Sulfur/Nitrogen Co‐Doped In‐Plane Porous Carbon Nanosheets as Superior Anode of Potassium‐Ion Batteries

Growth Mechanism of Micro/Nano Metal Dendrites and Cumulative Strategies for Countering Its Impacts in Metal Ion Batteries: A Review

Contact Info

Product

Resources

About