Low‐Resistance Porous Nanocellular MnSe Electrodes for High‐Performance All‐Solid‐State Battery‐Supercapacitor Hybrid Devices

Abstract

The increasing energy demand and serious population are critical issues in our modern society. There is an increasing demand for alternative sources of energy that are clean and sustainable. [1][2][3] Battery-supercapacitor hybrid (BSH) devices, Searching for materials with improved electrochemical behaviors is an important topic in portable energy storage devices. In this work a simple one-step solvothermal process is developed to rationally synthesize nanocellular α-MnSe and its applications in energy storage devices are studied. The MnSe faradic electrode shows a low internal resistance (0.37 Ω), high capacity (84.7 mAh g −1 at 10 mV s −1 ), good rate capability, and long cycle life. All-solid-state batterysupercapacitor hybrid (BSH) devices are assembled using binder-free nanocellular MnSe as the positive electrode and active carbon (AC) as the negative electrode. The MnSe//AC all-solid-state devices exhibit large energy and power densities (39.6 µWh cm −2 at 0.96 mW cm −2 ), extremely low internal resistance (only 1.34 Ω), fast charge process, outstanding cycle stability (119.79% retention after 8000 cycles), and flexibility with rather low bending loss. The wrist strap product by connecting three MnSe//AC all-solid-state devices in series can readily drive a green light-emitting diode for 3 min after 5 s of charging process. This work demonstrates that MnSe is an ideal low-resistance candidate of electrode materials for all-solid-state BSH devices, which is expected to facilitate the development in the portable and wearable energy storage.

Two‐Dimensional SnSe2/CNTs Hybrid Nanostructures as Anode Materials for High‐Performance Lithium‐Ion Batteries

“…[6][7][8][9][10] Carbon materials are currently used as commercial anodem aterials in lithium-ion batteries. [15][16][17][18][19][20][21] As an exceptional anode material for lithium-ion batteries, tinbaseda lloys have the advantages of high specific capacity and excellent safety performance, and have becomea ni mportant factori nt he development of anode materials for use in lithium-ion batteries. [11][12][13][14] In addition,t he low lithium storage capacity of carbon materials is the root cause of the difficultyo fi ncreasing the actual specific capacity.I nr ecent years, the designo fc omposite materi-als has been the main way to overcome these problems.…”

“…[11][12][13][14] In addition,t he low lithium storage capacity of carbon materials is the root cause of the difficultyo fi ncreasing the actual specific capacity.I nr ecent years, the designo fc omposite materi-als has been the main way to overcome these problems. [15][16][17][18][19][20][21] As an exceptional anode material for lithium-ion batteries, tinbaseda lloys have the advantages of high specific capacity and excellent safety performance, and have becomea ni mportant factori nt he development of anode materials for use in lithium-ion batteries. [22][23][24][25][26] Composite materials combiningc arbon and tin-based alloys have become an important kind of anode materialf or lithium-ion batteries and are now widely studied.…”

“…In addition, the low lithium storage capacity of carbon materials is the root cause of the difficulty of increasing the actual specific capacity. In recent years, the design of composite materials has been the main way to overcome these problems . As an exceptional anode material for lithium‐ion batteries, tin‐based alloys have the advantages of high specific capacity and excellent safety performance, and have become an important factor in the development of anode materials for use in lithium‐ion batteries .…”

Selective Growth of Zn–Co–Se Nanostructures on Various Conductive Substrates for Asymmetric Flexible Hybrid Supercapacitor with Enhanced Performance

“…Indeed, some metal nitrides [24] and sulfides [25] have been reported as new electroactive materials for SCs and often show better performance than oxides. [32][33][34][35][36][37][38][39][40][41][42] In their reports, the presence of selenium atom greatly enhanced electrochemical active sites. [32] Recent reports highlight that metal selenides might be effective electrode material for SCs.…”

“…Besides, metal selenides, as an important class of metal chalcogenides, possess high electrical conductivity and widely employed as electrocatalysts, [26][27][28][29] dye-sensitized solar cells (DSSCs), [30,31] and SCs. [32][33][34][35][36][37][38][39][40][41][42] In their reports, the presence of selenium atom greatly enhanced electrochemical active sites. [32][33][34][35][36][37][38][39][40][41][42] In their reports, the presence of selenium atom greatly enhanced electrochemical active sites.…”