Dual-ion battery using graphitic carbon and Li4Ti5O12: Suppression of gas formation and increased cyclability

Wang

et al. 2021

Adv Funct Materials

158

Dual‐ion batteries (DIBs), based on the working mechanism involving the storage of cations and anions separately in the anode and cathode during the charging/discharging process, are of great interest beyond lithium‐ion batteries (LIBs) in high‐efficiency energy storage due to the merits of high working voltage, material availability, as well as low cost and excellent safety. Despite the progress achieved, the practical applications of DIBs are still hindered by negative issues, such as limited capacity and cyclic stability, which triggers the development of suitable electrode materials with highly reversible capacities, and corresponding electrolytes with high oxidative stability as well as sufficient reaction kinetics of active ions. Herein, in this article, a systematic and comprehensive review of fundamentals and recent advances in current DIBs with subcategories of cathode materials, anode materials, and electrolytes are presented. In particular, their energy storage mechanisms, as well as their respective features, are dissected. Furthermore, some strategies and perspectives are proposed for facilitating the further development of DIBs in the future.

Section: Electrolytesmentioning

confidence: 99%

Section: Electrolytesmentioning

confidence: 99%

A Review of Emerging Dual‐Ion Batteries: Fundamentals and Recent Advances

Wang

et al. 2021

Adv Funct Materials

158

ACS Appl. Energy Mater.

“…In contemporary energy storage field, dual-ion battery (DIB) becomes increasingly attractive mainly because anion–graphite intercalation compounds (AGICs) are employed as the general positive electrode materials in such kind of battery. − In fact, the electrochemical performance of AGIC electrodes is dramatically affected by electrolyte solution. − Therefore, the choice of satisfactory electrolyte solution plays a very important role in designing an excellent DIB. To fulfill such a task, there are some criteria to be taken into account, for example, low cost, environmental benignity, adequate oxidation stability, broad temperature range of liquid state, suitable solvation states of anion, and so on.…”

Section: Introductionmentioning

confidence: 99%

PF₆^– Intercalation into Graphite Electrode from Propylene Carbonate

Zhu

Fan

2021

LiPF6-propylene carbonate (PC) solutions show some compatibility with the graphite positive electrode in dual-ion batteries. The relationship between the anion storage capacity and LiPF6 concentration is investigated by galvanostatic charge–discharge tests. Ex situ X-ray diffraction (XRD) measurements are carried out on graphite electrode recovered from Li/graphite cells at the end of charge to probe the storage situation of PC-solvated PF6 – inside graphite electrode. In situ XRD measurements on Li/graphite cells are performed to trace the crystal structural changes of anion–graphite intercalation compounds. Electrochemical quartz crystal microbalance (EQCM) measurement is conducted on graphite electrode to evaluate the transport of solvent during the anion storage. Nuclear magnetic resonance (NMR) and infrared (IR) spectroscopic studies on the solutions reveal the interactions between ions and PC solvent. The electrochemical performance of graphite is correlated with solvation state of LiPF6-PC solution.

ACS Sustainable Chem. Eng.

“…More importantly, in terms of their promising application in transportation systems, e.g., electrical vehicles and hybrid electric vehicles, the ever-growing demand for suitable electrodes delivering higher energy/power densities and a longer lifespan is becoming more and more urgent. 1,2 The electrochemical behavior of LIBs is greatly related to negative materials. Graphite, the most widely industrialized negative material, has some deficiencies such as forming lithium dendrites, poor rate capability, and a short lifespan of no more than 1000 charge/discharge cycles.…”

Section: ■ Introductionmentioning

confidence: 99%

“…In this regard, Li-ion batteries (LIBs) have attracted a lot of interest because of the prominent sustainability and high energy/power densities with respect to conventional lead–acid batteries and nickel–cadmium batteries. More importantly, in terms of their promising application in transportation systems, e.g., electrical vehicles and hybrid electric vehicles, the ever-growing demand for suitable electrodes delivering higher energy/power densities and a longer lifespan is becoming more and more urgent. , …”

Section: Introductionmentioning

confidence: 99%

Dual-Modified Li₄Ti₅O₁₂ Anode by Copper Decoration and Carbon Coating to Boost Lithium Storage

Bai

2020

The low electronic conduction of Li 4 Ti 5 O 12 negative materials for Li-ion batteries leads to unsatisfactory electrochemical performance. Here, we report a Li 4 Ti 5 O 12 anode modified by copper decoration and carbon coating to simultaneously boost the Li-ion storage capacity and rate capabilities. The optimal Li 4 Ti 5 O 12 anode reveals a remarkable reversible Li-ion storage capacity (285.3 mAh g −1 when cycled at 100 mA g −1 for 100 cycles) and significantly improved rate capabilities compared to pristine Li 4 Ti 5 O 12 . When cycled at 1000 mA g −1 , a reversible capacity of 189.4 mAh g −1 is retained after 500 cycles. The greatly enhanced electrochemical property is attributed to the dual effect of the carbon coating and copper decoration, which promotes the whole electronic conductivity.