Electronic modulation of nickel selenide by copper doping and in situ carbon coating towards high-rate and high-energy density lithium ion half/full batteries

Nanoscale ◽  
2020 ◽  
Vol 12 (46) ◽  
pp. 23645-23652
Author(s):  
Jingrui Shang ◽  
Huilong Dong ◽  
Hongbo Geng ◽  
Binbin Cao ◽  
Haidong Liu ◽  
...  
Keyword(s):  
Carbon Coating ◽  
Lithium Ion ◽  
Reversible Capacity ◽  
High Energy ◽  
High Rate ◽  
High Energy Density ◽  
Ion Transfer ◽  
Copper Doping ◽  
High Reversible Capacity

Copper doping and in situ carbon coating of nickel selenide composites with rapid electron/ion transfer kinetics manifest greatly boosted electrochemical performance in terms of high reversible capacity, stable cycling and good rate performances.

In situ preparation of 3D graphene aerogels@hierarchical Fe3O4 nanoclusters as high rate and long cycle anode materials for lithium ion batteries

2015 ◽  
Vol 51 (9) ◽  
pp. 1597-1600 ◽  
Author(s):  
Lishuang Fan ◽  
Bingjiang Li ◽  
David W. Rooney ◽  
Naiqing Zhang ◽  
Kening Sun
Keyword(s):  
Anode Materials ◽  
Rate Capability ◽  
Lithium Ion ◽  
Reversible Capacity ◽  
High Rate ◽  
3D Graphene ◽  
High Reversible Capacity ◽  
In Situ Preparation ◽  
Novel Strategy

We describe a novel strategy for in situ fabrication of hierarchical Fe3O4 nanoclusters–GAs. Fe3O4 NCs–GAs deliver excellent rate capability and a high reversible capacity of 577 mAh g−1 over 300 cycles at the current density of 5.2 A g−1.

scholarly journals In-Situ Annealed Ti3C2Tx MXene Based All-Solid-State Flexible Zn-Ion Hybrid Micro Supercapacitor Array with Enhanced Stability

2021 ◽  
Vol 13 (1) ◽  
Author(s):  
La Li ◽  
Weijia Liu ◽  
Kai Jiang ◽  
Di Chen ◽  
Fengyu Qu ◽  
...  
Keyword(s):  
High Energy ◽  
High Rate ◽  
High Energy Density ◽  
Electrochemical Performances ◽  
Integrated Electronics ◽  
Long Term Stability ◽  
Hybrid Supercapacitors ◽  
Portable Electronics

AbstractZn-ion hybrid supercapacitors (SCs) are considered as promising energy storage owing to their high energy density compared to traditional SCs. How to realize the miniaturization, patterning, and flexibility of the Zn-ion SCs without affecting the electrochemical performances has special meanings for expanding their applications in wearable integrated electronics. Ti3C2Tx cathode with outstanding conductivity, unique lamellar structure and good mechanical flexibility has been demonstrated tremendous potential in the design of Zn-ion SCs, but achieving long cycling stability and high rate stability is still big challenges. Here, we proposed a facile laser writing approach to fabricate patterned Ti3C2Tx-based Zn-ion micro-supercapacitors (MSCs), followed by the in-situ anneal treatment of the assembled MSCs to improve the long-term stability, which exhibits 80% of the capacitance retention even after 50,000 charge/discharge cycles and superior rate stability. The influence of the cathode thickness on the electrochemical performance of the MSCs is also studied. When the thickness reaches 0.851 µm the maximum areal capacitance of 72.02 mF cm−2 at scan rate of 10 mV s−1, which is 1.77 times higher than that with a thickness of 0.329 µm (35.6 mF cm−2). Moreover, the fabricated Ti3C2Tx based Zn-ion MSCs have excellent flexibility, a digital timer can be driven by the single device even under bending state, a flexible LED displayer of “TiC” logo also can be easily lighted by the MSC arrays under twisting, crimping, and winding conditions, demonstrating the scalable fabrication and application of the fabricated MSCs in portable electronics.

Hexamethylene diisocyanate as an electrolyte additive for high-energy density lithium ion batteries

2015 ◽  
Vol 3 (16) ◽  
pp. 8246-8249 ◽  
Author(s):  
Yang Liu ◽  
Yinping Qin ◽  
Zhe Peng ◽  
Jingjing Zhou ◽  
Changjin Wan ◽  
...  
Keyword(s):  
Energy Density ◽  
Lithium Ion Batteries ◽  
Propylene Carbonate ◽  
Interfacial Layer ◽  
Lithium Ion ◽  
High Energy ◽  
Hexamethylene Diisocyanate ◽  
High Energy Density ◽  
Electrolyte Additive

Hexamethylene diisocyanate can chemically react with the onium ion produced by the oxidation of propylene carbonate andin situgenerate a novel interfacial layer that is stable at high potential.

A universal strategy for thein situsynthesis of TiO2(B) nanosheets on pristine carbon nanomaterials for high-rate lithium storage

2018 ◽  
Vol 6 (16) ◽  
pp. 7070-7079 ◽  
Author(s):  
Long Pan ◽  
Zheng-Wei Zhou ◽  
Yi-Tao Liu ◽  
Xu-Ming Xie
Keyword(s):  
Synergistic Effect ◽  
Lithium Ion Batteries ◽  
Anode Materials ◽  
Carbon Nanomaterials ◽  
Lithium Ion ◽  
High Energy ◽  
High Rate ◽  
Lithium Storage ◽  
Storage Performance

A universal strategy is proposed for thein situsynthesis of TiO2(B) nanosheets on pristine carbon nanomaterials. Benefiting from a remarkable synergistic effect, the resulting nanohybrids exhibit superior high-rate lithium storage performance. In this sense, our strategy may open the door to next-generation, high-power and high-energy anode materials for lithium-ion batteries.

scholarly journals Building Safe Lithium-Ion Batteries for Electric Vehicles: A Review

2019 ◽  
Vol 3 (1) ◽  
pp. 1-42 ◽  
Author(s):  
Jian Duan ◽  
Xuan Tang ◽  
Haifeng Dai ◽  
Ying Yang ◽  
Wangyan Wu ◽  
...  
Keyword(s):  
Energy Density ◽  
Lithium Ion Batteries ◽  
Real Time ◽  
Electric Vehicles ◽  
Lithium Ion ◽  
High Energy ◽  
Temperature Tolerance ◽  
High Energy Density ◽  
Safety Features

Abstract Lithium-ion batteries (LIBs), with relatively high energy density and power density, have been considered as a vital energy source in our daily life, especially in electric vehicles. However, energy density and safety related to thermal runaways are the main concerns for their further applications. In order to deeply understand the development of high energy density and safe LIBs, we comprehensively review the safety features of LIBs and the failure mechanisms of cathodes, anodes, separators and electrolyte. The corresponding solutions for designing safer components are systematically proposed. Additionally, the in situ or operando techniques, such as microscopy and spectrum analysis, the fiber Bragg grating sensor and the gas sensor, are summarized to monitor the internal conditions of LIBs in real time. The main purpose of this review is to provide some general guidelines for the design of safe and high energy density batteries from the views of both material and cell levels. Graphic Abstract Safety of lithium-ion batteries (LIBs) with high energy density becomes more and more important in the future for EVs development. The safety issues of the LIBs are complicated, related to both materials and the cell level. To ensure the safety of LIBs, in-depth understanding of the safety features, precise design of the battery materials and real-time monitoring/detection of the cells should be systematically considered. Here, we specifically summarize the safety features of the LIBs from the aspects of their voltage and temperature tolerance, the failure mechanism of the LIB materials and corresponding improved methods. We further review the in situ or operando techniques to real-time monitor the internal conditions of LIBs.

scholarly journals High-Rate Layered Cathode of Lithium-Ion Batteries through Regulating Three-Dimensional Agglomerated Structure

Energies ◽  
2020 ◽  
Vol 13 (7) ◽  
pp. 1602 ◽  
Author(s):  
Jun-Ping Hu ◽  
Hang Sheng ◽  
Qi Deng ◽  
Qiang Ma ◽  
Jun Liu ◽  
...  
Keyword(s):  
Lithium Ion Batteries ◽  
Three Dimensional ◽  
Rate Capability ◽  
Lithium Ion ◽  
High Energy ◽  
High Rate ◽  
High Energy Density ◽  
High Rate Capability ◽  
Closed Structure ◽  
Short Lifecycle

LiNixCoyMnzO2 (LNCM)-layered materials are considered the most promising cathode for high-energy lithium ion batteries, but suffer from poor rate capability and short lifecycle. In addition, the LiNi1/3Co1/3Mn1/3O2 (NCM 111) is considered one of the most widely used LNCM cathodes because of its high energy density and good safety. Herein, a kind of NCM 111 with semi-closed structure was designed by controlling the amount of urea, which possesses high rate capability and long lifespan, exhibiting 140.9 mAh·g−1 at 0.85 A·g−1 and 114.3 mAh·g−1 at 1.70 A·g−1, respectively. The semi-closed structure is conducive to the infiltration of electrolytes and fast lithium ion-transfer inside the electrode material, thus improving the rate performance of the battery. Our work may provide an effective strategy for designing layered-cathode materials with high rate capability.

scholarly journals Improved cycling stability of LiCoO2 at 4.5 V via surface modification of cathode plates with conductive LLTO

2020 ◽  
Author(s):  
Shipai Song ◽  
Xiang Peng ◽  
Kai Huang ◽  
Hao Zhang ◽  
Fang Wu ◽  
...  
Keyword(s):  
Lithium Ion ◽  
Reversible Capacity ◽  
Cycling Performance ◽  
High Energy ◽  
High Energy Density ◽  
Coating Materials ◽  
Stability Issue ◽  
Rate Capacity ◽  
The Stability ◽  
Stability Issues

Abstract The stability issue of LiCoO 2 cycled at high voltages is one of the burning questions for the development of lithium ion batteries with high energy density and long cycling life. Although it is effective to improve the cycling performance of LiCoO 2 via coating individual LiCoO 2 particles with another metal oxides or fluorides, the rate capacity is generally compromised because the typical coating materials are poor conductors. Herein, amorphous Li 0.33 La 0.56 TiO 3 , one of the most successful solid electrolytes, was directly deposited on the surface of made-up LiCoO 2 cathode plates through magnetron sputtering. Not only the inherent conductive network in the made-up LiCoO 2 cathode plates was retained, but also the Li + transport in bulk and across the cathode-electrolyte interface was enhanced. In addition, the surface chemical analysis of the cycled LiCoO 2 cathode plates suggests that most of the stability issues can be addressed via the deposition of amorphous Li 0.33 La 0.56 TiO 3 . With an optimized deposition time, the LiCoO 2 cathode plates modified by Li 0.33 La 0.56 TiO 3 performed a steady reversible capacity of 150 mAh/g at 0.2 C with the cut-off voltage from 2.75 to 4.5 V vs. Li + /Li, and an 84.6% capacity gain at 5 C comparing with the pristine one.

Polyoxometalate-based metallogels as anode materials for lithium ion batteries

2019 ◽  
Vol 48 (28) ◽  
pp. 10422-10426 ◽  
Author(s):  
Xing Meng ◽  
Hai-Ning Wang ◽  
Yan-Hong Zou ◽  
Lu-Song Wang ◽  
Zi-Yan Zhou
Keyword(s):  
Lithium Ion Batteries ◽  
Anode Materials ◽  
Rate Capability ◽  
Lithium Ion ◽  
Reversible Capacity ◽  
High Rate ◽  
High Rate Capability ◽  
High Reversible Capacity ◽  
First Time ◽  
Good Cycling Stability

POM-based metallogels are employed as anode materials for the first time, which exhibit high reversible capacity, high rate capability, and good cycling stability.

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