Molecularly Compensated Pre‐Metallation Strategy for Metal‐Ion Batteries and Capacitors

Abstract

The use of as acrificial cathode additive as ap remetallation method could ensure adequate metal sources for advanced energy storage devices.However,this pre-metallation technique suffers from the precise regulation of decomposition potential of additive.H erein, am olecularly compensated premetallation (Li/Na/K) strategy has been achieved through Kolbe electrolysis,i nw hicht he electrochemical oxidation potential of ametal carboxylate is manipulated by the bonding energy of the oxygen-metal (O-M) moiety.T he electrondonating effect of the substituent and the lowcharge density of the cation can dramatically weaken the O-M bond strength, further bringing out the reduced potential. Thus,s odium acetate exhibits asuperior pre-sodiation feature for sodium-ion battery accompanied with alarge irreversible specific capacity of 301.8 mAh g À1 ,r emarkably delivering 70.6 %e nhanced capacity retention in comparison to the additive-free system after 100 cycles.T his methodology has been extended to construct ah igh-performance lithium-ion battery and al ithium/sodium/potassium-ion capacitor.

Hard‐Carbon Anodes for Sodium‐Ion Batteries: Recent Status and Challenging Perspectives

“…[167] Meanwhile, another method to enhance the ICE is to compensate for the irreversible Na loss through presodiation. [178,182] Presodiation of carbon anode through chemical sodiation agents, sodium-rich cathode, and cathode sacrificial additives shows great potential in full cells application. In general, a chemical sodiation agent shows the ability to partially sodiate anode bulks and contribute to form a stable SEI film, endowing the presodiated anode a high ICE of nearly 100%.…”

“…However, the potential for most additives is extremely high to release Na + ions, and introducing electron‐donating substituents to the sacrificial additives can weaken the bond strength of oxygen and metal, thereby reducing the potential. [ 182 ] However, gas evolution or dead mass is unavoidable during the oxidation process of the sacrificial additives. Therefore, original sacrificial cathode additives must be designed to solve these issues for further application.…”

Carbon Encapsulated and rGO Wrapped Mo2C: an Anode Material with Enhanced Sodium Storage Capacity

“…In 1970s advancement of lithium‐ion battery was very prominent due to its better performance. Later, researchers started focusing on advancement in sodium ion batteries due to higher abundance of sodium which led to low‐cost batteries [1–10] . The prime obstacle in advancement of sodium ion battery (SIB) research is the nonavailability of suitable anode material.…”

“…Later, researchers started focusing on advancement in sodium ion batteries due to higher abundance of sodium which led to low-cost batteries. [1][2][3][4][5][6][7][8][9][10] The prime obstacle in advancement of sodium ion battery (SIB) research is the nonavailability of suitable anode material. Graphite anode is not suitable anode for SIB due to unfavourable thermodynamic stability of sodiated graphite.…”

High‐Energy Aqueous Asymmetric Supercapacitors via Synergistic Design of Electrodes Derived from Hierarchical Vanadium Dioxide Nanocomposites

“…In recent years, various energy storage devices have sprung up to meet the development of the markets. [1][2][3][4] Among them, supercapacitors (SCs) have been arousing extensive investigation interest due to their high power density, rapid charging/ discharging rate and environmental friendliness. [5] Nevertheless, the energy density is still astricted depending on the formula of E ¼ 1 2 CV 2 , thus it is imperative to provoke the energy density by improving the specific capacitance (C) and extending the working voltage (V) without sacrificing power density.…”