A conducting additive-free high potential quinone-based conducting redox polymer as lithium ion battery cathode

• Organic carbonyl compounds have been considered as promising alternatives to traditional inorganic battery materials due to their low-cost, sustainability and structural diversity. The development of carbonyl compounds as energy storage materials is, however, hampered by dissolution as well as by the low electronic conductivity of these materials. Herein a conducting redox polymer concept is employed where the carbonyl group is functionalized onto a conducting polymer. The utilization of a conducting polymer prevents the dissolution and provides electron transport pathways to support the carbonyl group redox reaction. A high potential quinizarin (Qz) is used as capacity-carrying group. It is functionalized onto a thiophene-based trimer unit which is polymerized through a post-deposition polymerization method. In the resulting material, Qz is redox-matched with the conducting polymer backbone and exhibits two reversible 1e/1Li + redox processes at 3.1 and 3.4 V vs. Li + /0 , respectively. Together with a lithium metal anode, a battery cell with an average discharge voltage of 3.3 V, a discharge capacity of 65 mAh/g at 1.5 C and a capacity retention of 74% after 500 cycles is assembled. 

Subject headings

NATURVETENSKAP  -- Kemi -- Materialkemi (hsv//swe)

NATURAL SCIENCES  -- Chemical Sciences -- Materials Chemistry (hsv//eng)

NATURVETENSKAP  -- Kemi -- Fysikalisk kemi (hsv//swe)

NATURAL SCIENCES  -- Chemical Sciences -- Physical Chemistry (hsv//eng)

Keyword

Quinone

Qz

High potential

Organic battery

Conducting additive free

Teknisk fysik med inriktning mot nanoteknologi och funktionella material

Engineering Science with specialization in Nanotechnology and Functional Materials

Teknisk fysik med inriktning mot nanoteknologi och funktionella material

Engineering Science with specialization in Nanotechnology and Functional Materials

Publication and Content Type

ref (subject category)

art (subject category)