An advanced high-energy sodium ion full battery based on nanostructured Na 2 Ti 3 O 7 /VOPO 4 layered materials

115

The ORCID identification number(s) for the author(s) of this article can be found under https://doi.org/10.1002/aenm.201900022. Sodium-Ion BatteriesSodium-ion batteries (SIBs) are promising for large-scale electric energy storage due to the high abundance and wide distribution of sodium resources (Na, 2.74% in the Earth's crust). [1] Construction of full SIBs strongly relies on the selected cathodes, anodes, and their compatibility with electrolytes. [2] Although progress has been obtained in the separate individual cathode and anode, full SIBs with high performance, especially high power density, are still lacking. [3] This is closely related to the large-sized Na + (1.02 Å) as charge carriers shuttling between cathode and anode, which usually leads to sluggish kinetics and structural instability of electrode materials. [4] When operated below 0 °C outdoors for practical applications, the reaction and transport kinetics of SIBs becomes severely slow, [2,5] resulting in reduced capacity, efficiency, and power density. Therefore, realization of full SIBs with high power density and operation in a wide temperature range is faced with

Section: A High-power Na 3 V 2 (Po 4 ) 3 -Bi Sodium-ion Full Battery mentioning

confidence: 99%

A High‐Power Na₃V₂(PO₄)₃‐Bi Sodium‐Ion Full Battery in a Wide Temperature Range

Wang

Song

et al. 2019

115

“…The Na 2 Ti 3 O 7 //VOPO 4 and Na 2 Ti 3 O 7 //Na 2/3 Ni 1/3 Mn 2/3 O 2 full cells delivered outstanding rate capability and excellent cycling stability. [89,90] It is worth pointing out that Na 2 Ti 3 O 7 //VOPO 4 full-cell SIBs offered a high energy density of 220 W h kg −1 compared to existing LIBs. Hard carbon (HC) has also been presodiated to ameliorate the unsatisfactory initial coulombic efficiency and cycle life for the full cell and to compensate for Na loss in the formation of the solid electrolyte interphase (SEI) layer.…”

Section: Asymmetric Sodium-ion Full-cell System Based On Presodiated mentioning

confidence: 99%

Sodium‐Ion Batteries: From Academic Research to Practical Commercialization

Deng

Luo

Chou

et al. 2017

522

342

Sodium‐ion batteries (SIBs) have been considered as the most promising candidate for large‐scale energy storage system owing to the economic efficiency resulting from abundant sodium resources, superior safety, and similar chemical properties to the commercial lithium‐ion battery. Despite the long period of academic research, how to realize sodium‐ion battery commercialization for market applications is still a great challenge. Thus, from the perspective of future practical application, this review will identify the factors that are restricting commercialization, and evaluate the existing active materials and sodium‐ion‐based full‐cell system. The design and development trends that are needed for SIBs to meet the requirements of practical applications in large‐scale energy storage will also be discussed in detail.

“…[6][7][8] It is expected that such hybrid system delivers a capacitor-like fast charge/ discharge rate and battery-like high capacity. [15][16][17][18][19][20][21][22] Despite the potential low-cost, constructing hybrid sodium ion capacitors (NICs) faces more challenge because most Na host materials have a rather sluggish kinetic due to the large Na ion sizes. In a LIC, the capacitive cathode is typically a carbonaceous material that enables fast charge− discharge processes, while the reported battery-type anode includes Li 4 Ti 5 O 12 , [9,10] graphite, [11] TiO 2 , [12] MnO, [13] and LiVO 3 .…”

mentioning

confidence: 99%

Flexible Quasi‐Solid‐State Sodium‐Ion Capacitors Developed Using 2D Metal–Organic‐Framework Array as Reactor

Chao

Wang

et al. 2018

199

121

storage device, lithium ion batteries can provide high energy but usually suffer from a low power rate and short life span. To overcome these drawbacks, researchers propose the so-called metal-ion capacitors, or hybrid batteries, which combine a battery anode and a capacitor electrode in order to achieve tradeoff between conventional battery and supercapacitor. [6][7][8] It is expected that such hybrid system delivers a capacitor-like fast charge/ discharge rate and battery-like high capacity. Since the first introduction in 2001, great progress has been achieved in the field of hybrid lithium-ion capacitors (LICs) through better understanding of the charge storage mechanism and the development of highperformance nanostructured materials. In a LIC, the capacitive cathode is typically a carbonaceous material that enables fast charge− discharge processes, while the reported battery-type anode includes Li 4 Ti 5 O 12 , [9,10] graphite, [11] TiO 2 , [12] MnO, [13] and LiVO 3 . [14] Sodium-ion batteries are becoming one of most promising battery technologies for the foreseeable grid-scale applications, because of more earth-abundant sodium source and their similar chemistry to that of the existing lithium-ion batteries. [15][16][17][18][19][20][21][22] Despite the potential low-cost, constructing hybrid sodium ion capacitors (NICs) faces more challenge because most Na host materials have a rather sluggish kinetic due to the large Na ion sizes. Research on NICs began in early 2012, [23] and was focused on improving the power capability of the anode in order to match the fast kinetics of the capacitive cathode. Strategies to increase sodium ion (Na + ) and electron (e − ) transport kinetics of NIC electrodes reported so far include: (1) developing new electrode materials (such as 2D MXene Ti 2 C, [24] V 2 C), [25] (2) constructing more conductive electrode structures by hybridizing with carbon (such as NaTi 2 (PO 4 ) 3 /rGO, [26] C@NVP, [27] Nb 2 O 5 @C/rGO, [28] TiO 2 mesocages@rGO, [29] and (3) shortening the ion diffusion and electron transport lengths by rational designing nanostructures (such as TiO 2 nanospheres, [30] Ti(O,N) nanowires, [31] Na 2 Ti 3 O 7 nanosheets [32] ). Despite these efforts, these reported anodes of NIC still have relatively limited rate performance and especially low Na-ion storage capacity. Among other reasons, most of these electrode materials are powder samples, which require substantial amount of conductive additives (such as super P, 10-20 wt%) and binder in order to make compact films. This not only weakens the electron transport but also unable to meet the flexibility requirement.Achieving high-performance Na-ion capacitors (NICs) has the particular challenge of matching both capacity and kinetics between the anode and cathode. Here a high-power NIC full device constructed from 2D metal-organic framework (MOFs) array is reported as the reactive template. The MOF array is converted to N-doped mesoporous carbon nanosheets (mp-CNSs), which are then uniformly encapsulated with VO 2 and Na...