Preparation of Si-graphite dual-ion batteries by tailoring the voltage window of pretreated Si-anodes

Perspective on Performance, Cost, and Technical Challenges for Practical Dual-Ion Batteries

“…), intercalation or insertion-type anode materials (graphite, 29,30,35 amorphous carbon, 67 TiO 2 , 68,69 MoO 3 , 70 MoS 2 , 71,72 etc. ), alloying materials (Sn, 73 Si, 74 etc. ), activated carbon 50,54,75 DIB cells using an activated carbon anode and an anion intercalating cathode are also often referred to as ''hybrid capacitors,'' as a supercapacitor electrode (physical adsorption) is combined with an intercalation electrode (chemical reaction).…”

“…108 Also, for DIBs and DGBs, it was shown that pre-lithiation or predoping can remarkably improve the lifetime of the cells. 46,74 Overall, the use of suitable pre-doping techniques, as well as the development of electrolytes that ensure neglectable oxidative and reductive decomposition reactions at the positive (=cathode) and negative electrode (=anode), respectively, are major targets to improve the lifetime of DIBs. In summary, further material improvements and deeper fundamental understanding are needed to develop high-performance DIBs.…”

Construction of Kinetics Pathways in Lithium Titanate Composite Material to Quickly Store Sodium Ion for the Dual-Ion Batteries

“…During the charging process, the dissociated sodium ions from the electrolyte are inserted by the LTO anode, which gradually changes into the Li 4 Na 3 Ti 5 O 12 phase . At the same time, the layered graphite was used as the cathode electrode to intercalate the anion of hexafluorophosphate to form, gradually, the structure of C x [PF 6 ]. , The value of x in C x [PF 6 ] depends on different half-cell systems, the voltage range, and the experimental measurement. During the discharge, the sodium ions are extracted from the LTO phase and again enter the solution.…”

High-Performance Lithium-Ion-Based Dual-Ion Batteries Enabled by Few-Layer MoSe2/Nitrogen-Doped Carbon

“…As is well-known, the electrochemical properties of DIBs are significantly determined by the electrode materials, and to date, only a few materials have been reported to host the large anions reversibly, such as graphite, , organic polymers, , and redox-active metal–organic frameworks. , Among them, graphite is the most consolidated cathode because of its relatively high capacity and low cost. , Thus, searching for suitable anode materials for hosting cations might be a more adoptable way to further develop DIBs. Typically, graphite has been widely investigated as an anode since the first proposition of a prototype for DIBs, which are called dual-graphite batteries in the early 1990s. − Nevertheless, the limitations of intercalation-type graphite anodes have also been evident, such as the small number of active sites and the sluggish kinetics. , Recently, a series of DIBs using alloy-type anodes have been developed, such as alkali metals, , Al, , Sn, , Si, etc., and their electrochemical properties have been enhanced owing to the alloying/dealloying process on the anode. On the other hand, conversion-type anodes are more promising due to their high theoretical capacities and the elimination of dendrite formation.…”