Facile Synthesis of Porous Coralline LiVO₃ as High‐Performance Li‐Ion Battery Cathodes

Abstract

A facile and easily scaled‐up polymer‐pyrolysis method is developed to synthesize porous coralline LiVO3 as cathodes for lithium‐ion batteries (LIBs). Polyacrylates of Li and V are used as the precursor compounds. The nanostructured LiVO3 delivers a high specific capacity of 307.6 mAh g−1 with a remarkable capacity retention of 80.6% after 100 cycles. In addition, a high energy density close to 800 Wh kg−1 as well as a competitive power density of ∼4500 W kg−1 are attained. Such excellent lithium storage performance derives from its porous nanoarchitecture, which not only supplies numerous active sites for electrochemical reactions, and shortens Li‐ions diffusion distance, but also provides enough void space to buffer the volume change during lithium intercalation and deintercalation. Therefore, the porous coralline LiVO3 justifies its potential practical application as an alternative to high energy and high power electrode materials for lithium‐ion batteries. The simple approach opens up a new way to fabricate other types of porous coralline energy storage materials.

Design Strategies for High‐Voltage Aqueous Batteries

“…[2,8] However, the widespread usage of flammable and expensive organic electrolyte has drawn the increasing concerns about safety and cost in conventional nonaqueous Li-ion batteries. [8][9][10][11] A safety accident in an electric vehicles application or a large-scale energy storage station will result in a disastrous consequence with economic loss and the inflammability of organic electrolytes is often criticized as the main cause for fire accidents.…”

C-Doped LiVO3 Honeycombs Derived from the Biomass Template Strategy for Superior Lithium Storage

“…57,58 The peak located at 0.58 V is ascribed to the solid electrolyte interface film formation and the lithiation of C-doped LiVO 3 HCs. 59 In the subsequent two cycles, two couples of redox peaks locates at 0.81/0. 61,62 The reaction kinetics analyses were carried out to deeply understand the mechanism of the C-doped LiVO 3 HCs with outstanding electrochemical performance.…”

“…In order to estimate the lithium insertion/extraction behavior of the C-doped LiVO 3 HCs//Li half-cell, cyclic voltammetry (CV) measurement was analyzed in a voltage region of 0.01–3 V. As exhibited in Figure a, a clear irreversible peak located at 1.52 V was observed in the initial cathodic scan with a significant difference from subsequent scans, indicating that an irreversible phase transition occurs, accompanied by the activation process. , The peak located at 0.58 V is ascribed to the solid electrolyte interface film formation and the lithiation of C-doped LiVO 3 HCs . In the subsequent two cycles, two couples of redox peaks locates at 0.81/0.56 and 2.04/1.87 V indicate a multistep lithium insertion process.…”

Construction of a LiVO3/C core–shell structure for high-rate lithium storage

“…[14][15][16] LiVO 3 with few lithium atoms, has been deeply studied as a cathode for LIBs owing to its unidimensional structure and fast capability for ion transfer. [17][18][19][20][21][22][23][24][25][26][27][28][29] LiVO 3 also shows the potential for lithium storage as an anode, but its mechanism and related research on electrochemical behavior are in a preliminary stage, which hinders its further development. [29][30][31][32] The morphology of the electrode is also regarded as an important ingredient for reaction kinetics during the cycling process, and determines its electrochemical properties.…”