Incorporating cyclized-Polyacrylonitrile with Li4Ti5O12 Nanosheet for High Performance Lithium Ion Battery Anode Material

Sun, Yunong; Dong, Hui; Xu, Yisheng; Zhang, Yang; Zhao, Chongjun; Wang, Di; Liu, Zhe; Liu, Dong

doi:10.1016/j.electacta.2017.05.080

Cited by 21 publications

(8 citation statements)

References 25 publications

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“…Conductive Binders : Similar to the conductive polymer coating in the core–shell strategy, conductive polymers are usually employed as functional binder to construct ETN in the composite electrodes . In this case, the conductive polymers act as both conductive agent and binder.…”

Section: Controlling Etn In Composite Electrodesmentioning

confidence: 99%

Strategies for Building Robust Traffic Networks in Advanced Energy Storage Devices: A Focus on Composite Electrodes

Wang

Min

et al. 2018

Advanced Materials

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portable electronics, cell phones, electrical vehicles (EVs), aerospace, etc. For advanced batteries, higher and higher energy density and/or power density, long cycling stability, good device safety, and low-cost are the primary goals. Since the energy density is mainly dependent on the specific capacity and loading level of active materials (AMs), AMs usually dominate the volume and weight inside the batteries. Because of this, tremendous efforts have been focused on high-performance AMs. However, the electrochemical performance of energy storage devices (ESDs) is fundamentally determined by a collective contribution or teamwork of all the components: AMs, electrolyte, separator, conductive agent, binders, etc. More importantly, with the increasing interests on high-capacity AMs (e.g., silicon, sulfur, Li-rich cathode, etc.), it becomes very clear that the "traffic system" (i.e., the charge transport system) plays very critical roles in the performance of the high-capacity AMs. Take silicon anode for example, a durable and flexible conductive network inside the electrode composite has been vital for addressing the big volume change issue. In this case, high-performance binders and conductive agent that can generate advanced conductive network are the keys. [2] In addition, with the increasing interests on EVs and flexible electronics, building a powerful and robust charge transport system inside ESDs is an urgent and critical task to support fast charging/ discharging capability and even flexibility of ESDs. In short, with the fast development of energy storage technologies, EVs, cell phones, etc., there is a critical, urgent, and challenging task on building powerful and durable charge transport system in next-generation advanced ESDs. Charge Transport Inside ESDsThe thriving of big cities highly relies on a powerful traffic system that transports the people, foods, products, etc. Similar to this picture, ESDs are powered by the transportation of charges, including both ions and electrons. As illustrated in Figure 1a, one can analogize the charge transport system and AMs in the electrodes of ESDs to the traffic system and buildings (i.e., host system of people), respectively. This analogy example not only help to explain the relationship between The charge transport system in an energy storage device (ESD) fundamentally controls the electrochemical performance and device safety. As the skeleton of the charge transport system, the "traffic" networks connecting the active materials are primary structural factors controlling the transport of ions/electrons. However, with the development of ESDs, it becomes very critical but challenging to build traffic networks with rational structures and mechanical robustness, which can support high energy density, fast charging and discharging capability, cycle stability, safety, and even device flexibility. This is especially true for ESDs with high-capacity active materials (e.g., sulfur and silicon), which show notable volume change during cycling. Therefore, there is an ur...

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Section: Controlling Etn In Composite Electrodesmentioning

confidence: 99%

Strategies for Building Robust Traffic Networks in Advanced Energy Storage Devices: A Focus on Composite Electrodes

Wang

Min

et al. 2018

Advanced Materials

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“…Sun et al. [13] used hydrothermal method to synthesize nanosheet‐like LTO with high capacity of 180 and 110 mAh g −1 at 1 C and 20 C, respectively. The second method was designing a conductive layer on the surface of LTO to promote the conductivity of the composite [15–18].…”

Section: Introductionmentioning

confidence: 99%

“…To overcome the issues, researchers have developed approaches in three aspects [1,3,10,11]. The first one was to prepare various nano-morphological LTOs to reduce the diffusion distance of Li + and the electron transport path, thereby accelerating the insertion/extraction reaction of lithium ions into LTO [12][13][14]. Sun et al [13] used hydrothermal method to synthesize nanosheet-like LTO with high capacity of 180 and 110 mAh g −1 at 1 C and 20 C, respectively.…”

mentioning

confidence: 99%

“…The first one was to prepare various nano-morphological LTOs to reduce the diffusion distance of Li + and the electron transport path, thereby accelerating the insertion/extraction reaction of lithium ions into LTO [12][13][14]. Sun et al [13] used hydrothermal method to synthesize nanosheet-like LTO with high capacity of 180 and 110 mAh g −1 at 1 C and 20 C, respectively. The second method was designing a conductive layer on the surface of LTO to promote the conductivity of the composite [15][16][17][18].…”

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confidence: 99%

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Pomegranate‐like high density LTO anode material for lithium‐ion batteries

Zhang

Bai

et al. 2020

Micro & Nano Letters

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In order to improve the rate performance and reduce the cost lithium ion anode, the Li4Ti5O12@TiO2 (LTO‐TO) was prepared by a facile hydrothermal reaction method with a micro‐scale TiO2 as the precursor. The morphologies and microstructures of the pomegranate‐like LTO‐TO were examined by scanning electron microscopy and transition electron microscopy. The results demonstrate that the nano‐LTO particles are located on the surface of the micro TiO2. The electrochemical properties of the LTO‐TO composites were characterized by galvanostatic charge/discharge. The as‐prepared composites present a high capacity of 157.3 mAh g−1 at 0.5 C. Even at a high current density of 10 C, it can still maintain a high capacity of 105.4 mAh g−1 and remains 92.8% (95 mA g−1) after 450 cycles. These results indicate that the as‐prepared LTO nano/micro‐sphere may be a potential anode material for lithium‐ion batteries.

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“…Lithium titanate (LTO) batteries have many advantages, such as high safety, good rate performance, long cycle life and excellent lowtemperature performance. [1][2][3] They have broad application prospects in fast-charging electric vehicles, power grid energy storage fields requiring ultra-long cycle life and low-temperature environment. [4][5][6] At present, the reasons that hinder the large-scale commercial promotion of LTO batteries are not only the high price and low energy density but also the serious deterioration of battery performance caused by the gassing at elevated temperature.…”

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confidence: 99%

An On-Line Transient Study on Gassing Mechanism of Lithium Titanate Batteries

Wang

Rafiz

et al. 2019

J. Electrochem. Soc.

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Gassing at elevated temperature is the main reason for the performance degradation of lithium titanate (Li 4 Ti 5 O 12 , LTO) batteries. In this study, an in-situ device was developed and used to study on-line the transient gassing of custom-made 4.5Ah LTO/NCM pouch batteries at 1C cycling at 55°C. The gas volume and internal pressure of the batteries were recorded on-line for 1000 h, and the composition of the gas components at different times was also analyzed by on-line gas chromatography. The results show that H 2 and CO 2 are the main gas components. The H 2 percentage decreases, while the CO 2 percentage increases gradually during the process of gassing. According to the rate-controlling step of gassing from H 2 formation reaction to CO 2 , a stage-by-stage mixed gassing mechanism is proposed, where the water decomposition is dominant in the initial stage and solvent decomposition is dominant in the subsequent stage. The gassing of LTO batteries aged at 55°C was studied on-line at different states of charge (0%, 50%, 100% SOC). The results show that the volume and composition of the gas are essentially independent of the SOC of batteries and that formation of SEI at LTO interface is the main reason for the gassing rate reduction when aged and cycled (final phase) at 55°C.

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Incorporating cyclized-Polyacrylonitrile with Li4Ti5O12 Nanosheet for High Performance Lithium Ion Battery Anode Material

Cited by 21 publications

References 25 publications

Strategies for Building Robust Traffic Networks in Advanced Energy Storage Devices: A Focus on Composite Electrodes

Strategies for Building Robust Traffic Networks in Advanced Energy Storage Devices: A Focus on Composite Electrodes

Pomegranate‐like high density LTO anode material for lithium‐ion batteries

An On-Line Transient Study on Gassing Mechanism of Lithium Titanate Batteries

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