Hybrid supercapacitor with nano-TiP2O7 as intercalation electrode

Sodium‐Doped Mesoporous Ni2P2O7 Hexagonal Tablets for High‐Performance Flexible All‐Solid‐State Hybrid Supercapacitors

“….F urthermore, we also comparedt he energy density and power density of our work with previously reported research, such as NiCo 2 O 4 @MnO 2 //activated carbon ), [36] NiC [39] Ni(OH) 2 //activated carbon (9.8 Wh kg À1 ,1 54 Wkg À1 ), [40] TiP 2 O 7 //activated carbon (13 Wh kg À1 ,3 71 Wkg À1 ), [41] and NiO//carbon (11Whkg À1 , 500 Wkg À1 ). [42] Additionally,t he flexible solid-state hybrid supercapacitor device has am aximum power density of 6.53 kW kg À1 .T he results above confirmed that the porousN adoped Ni 2 P 2 O 7 hexagonal tablets are promising anode materials for flexible solid-state hybrid supercapacitors.…”

High Performance TiP2O7Based Intercalation Negative Electrode for Aqueous Lithium-Ion Batteries via a Facile Synthetic Route

“…20,21 However, this redox potential makes TiP 2 O 7 an ideal anode material candidate for aqueous lithium-ion batteries, 22,23 which have been recently explored by several research groups. 21,22 TiP 2 O 7 has a 3D framework structure with a corner sharing a TiO 6 octahedra and a PO 4 tetrahedra, and a phase change reaction between TiP 2 O 7 and LiTiP 2 O 7 .…”

“…[7][8][9][10][11][12][13][14][15][16][17][18][19] A less explored phase, TiP 2 O 7 , is not a promising cathode candidate for lithium-ion battery due to its low redox potential of 2.6 V versus Li/Li + . 20,21 However, this redox potential makes TiP 2 O 7 an ideal anode material candidate for aqueous lithium-ion batteries, 22,23 which have been recently explored by several research groups. 21,22 TiP 2 O 7 has a 3D framework structure with a corner sharing a TiO 6 octahedra and a PO 4 tetrahedra, and a phase change reaction between TiP 2 O 7 and LiTiP 2 O 7 .…”

Unveiling TiNb2O7 as an Insertion Anode for Lithium Ion Capacitors with High Energy and Power Density

“…Regarding the cathodes for the Li-HEC, activated carbon (AC) is the unanimous choice for the electroactive material because of its fascinating advantages, such as high specific surface area, electronic conductivity, thermal stability, excellent chemical stability with a wide range of pH values, and cost-effectiveness. [9,10] So far, several materials have been proposed as prospective insertion hosts for Li-HEC applications, for instance, Li 4 Ti 5 O 12 , [4,[11][12][13][14] LiCrTiO 4 , [15] TiO 2 -B, [16,17] bFeOOH, [18] a-MnO 2 , [19] TiP 2 O 7 , [20] and LiTi 2 (PO 4 ) 3 .[21] Among them, spinel-phase Li 4 Ti 5 O 12 is attractive in terms of appreciable capacity, good reversibility, no volume variation during lithium insertion/extraction ("zero-strain" insertion host), a flat operating potential of about 1.5 V versus lithium, excellent cyclability, low cost, and eco-friendliness. [4,[11][12][13][14] Unfortunately, the energy density is limited to about 34 Wh kg À1 when coupled with AC as a result of the restricted amount of lithium insertion into spinel-phase Li 4 Ti 5 O 12 (reversible insertion of 3 mol of Li corresponds to a theoretical capacity of % 175 mA h g À1 ).…”